(Translated by https://www.hiragana.jp/)
A324057 - OEIS
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A324057
a(n) = A106315(A005940(1+n)).
9
0, 1, 2, 5, 4, 0, 1, 2, 6, 4, 12, 16, 13, 30, 28, 18, 10, 8, 20, 36, 44, 24, 36, 12, 33, 21, 78, 51, 32, 72, 42, 3, 12, 16, 36, 0, 4, 48, 66, 50, 20, 128, 72, 48, 58, 144, 120, 108, 97, 75, 198, 32, 102, 312, 10, 84, 172, 128, 504, 176, 1, 168, 2, 67, 16, 20, 44, 12, 8, 96, 126, 88, 28, 16, 168, 112, 162, 264, 232, 56, 68, 80, 312, 0, 200, 480, 36, 120
OFFSET
0,3
FORMULA
a(n) = A106315(A005940(1+n)).
a(n) = A005940(1+n)*A106737(n) mod A324054(n).
PROG
(PARI)
A005940(n) = { my(p=2, t=1); n--; until(!n\=2, if((n%2), (t*=p), p=nextprime(p+1))); t }; \\ From A005940
A106315(n) = (n*numdiv(n) % sigma(n));
A324057(n) = A106315(A005940(1+n));
CROSSREFS
KEYWORD
nonn
AUTHOR
Antti Karttunen, Feb 14 2019
STATUS
approved