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A114824
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Indices of Fibonacci numbers with 12 distinct prime factors.
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3
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176, 192, 198, 224, 297, 315, 364, 385, 410, 430, 441, 455, 496, 555, 582, 606, 609, 621, 627, 638, 682, 710, 711, 726, 729, 734, 759, 775, 805, 814, 826, 846, 854, 897, 903, 908, 932, 935, 981, 987, 994, 1001, 1002, 1022, 1025, 1067, 1086, 1089, 1105, 1244, 1246
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OFFSET
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1,1
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LINKS
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EXAMPLE
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a(1)=176 because 176th Fibonacci number (i.e. 2706074082469569338358691163510069157) consists of 12 distinct prime factors (i.e. 3 * 7 * 43 * 47 * 89 * 199 * 263 * 307 * 881 * 967 * 93058241 * 56241856)
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MATHEMATICA
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Flatten[Position[Fibonacci[Range[1110]], _?(PrimeNu[#]==12&)]] (* Harvey P. Dale, Jan 17 2015 *)
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PROG
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(PARI) n=1; while(n<320, if(omega(fibonacci(n))==12, print1(n, ", ")); n++)
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CROSSREFS
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KEYWORD
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hard,nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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