A233282 Positions of records in partial LCM-products (A233287) of Fibonacci entry points (A001177).

1, 2, 3, 5, 7, 13, 17, 25, 37, 43, 47, 53, 59, 67, 73, 79, 97, 125, 127, 137, 157, 163, 179, 193, 243, 257, 269, 277, 283, 311, 313, 317, 337, 353, 359, 397, 439, 457, 479, 487, 499, 509, 523, 547, 563, 577, 613, 617, 625, 653, 673, 677, 719, 729, 733, 757, 787

Offset

1,2

Comments

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

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

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

Links

Antti Karttunen, Table of n, a(n) for n = 1..338

Prog

(Scheme, with Antti Karttunen's IntSeq-library)
(define A233282 (RECORD-POS 1 1 A233287))

Crossrefs

A233283 gives the corresponding record values.

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

Sequence in context: A024785 A069866 A125772 * A001000 A094947 A231474

Adjacent sequences: A233279 A233280 A233281 * A233283 A233284 A233285

Keyword

nonn

Author

Antti Karttunen, Dec 13 2013

Status

approved