A233282 - OEIS

%I #15 Mar 13 2018 04:16:47

%S 1,2,3,5,7,13,17,25,37,43,47,53,59,67,73,79,97,125,127,137,157,163,

%T 179,193,243,257,269,277,283,311,313,317,337,353,359,397,439,457,479,

%U 487,499,509,523,547,563,577,613,617,625,653,673,677,719,729,733,757,787

%N Positions of records in partial LCM-products (A233287) of Fibonacci entry points (A001177).

%C Seems also to be positions of records for lcm_{i=1..n} A001175(i).

%C After 1, only primes and prime powers seem to occur.

%C Positions where a(n) is not a prime are 1, 8, 18, 25, 49, 54, 65, 75, 102, 111, 136, 164, 237, ...

%H Antti Karttunen, <a href="/A233282/b233282.txt">Table of n, a(n) for n = 1..338</a>

%o (Scheme, with _Antti Karttunen_'s IntSeq-library)

%o (define A233282 (RECORD-POS 1 1 A233287))

%Y A233283 gives the corresponding record values.

%Y Cf. A001175, A001176, A001177, A233281, A233287.

%K nonn

%O 1,2

%A _Antti Karttunen_, Dec 13 2013