A114825 - OEIS

A114825

Indices of Fibonacci numbers with 11 distinct prime factors.

140, 144, 150, 160, 162, 190, 204, 208, 230, 234, 261, 285, 306, 310, 345, 351, 354, 372, 387, 388, 399, 438, 459, 469, 470, 475, 483, 485, 488, 507, 508, 518, 531, 549, 568, 596, 598, 632, 656, 671, 686, 688, 715, 788, 806, 808, 822, 834, 844, 872, 873, 874, 902, 925, 1005, 1048, 1052, 1058, 1073, 1076, 1083, 1101, 1113, 1124, 1131, 1146, 1158, 1162, 1166, 1173, 1195, 1205, 1221

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OFFSET

1,1

LINKS

Amiram Eldar, Table of n, a(n) for n = 1..81

Blair Kelly, Fibonacci and Lucas Factorizations.

EXAMPLE

a(1)=140 because the 140th Fibonacci number (i.e., 81055900096023504197206408605) consists of 11 distinct prime factors (i.e., 3 * 5 * 11 * 13 * 29 * 41 * 71 * 281 * 911 * 141961 * 12317523121).

PROG

(PARI) n=1; while(n<315, if(omega(fibonacci(n))==11, print1(n, ", ")); n++)

CROSSREFS

Column k=11 of A303217.

Sequence in context: A215571 A108317 A252963 * A308617 A353074 A224982

Adjacent sequences: A114822 A114823 A114824 * A114826 A114827 A114828

KEYWORD

nonn

AUTHOR

Shyam Sunder Gupta, Feb 19 2006

EXTENSIONS

More terms from Ryan Propper, Apr 26 2006

a(52)-a(73) from Max Alekseyev, Aug 18 2013

STATUS

approved