A242463 a(n) = A152466(n) + 1.

253, 2773, 130285, 651421, 219528541, 257067920341, 4370154645781, 292800361267261, 11023640801351071741, 13475008472558425746927448861, 5107028211099643358085503117941, 1313771981231475489737485570488833367541

Offset

1,1

Comments

Conjecture: this sequence has no prime terms.

A152466(n+1) = A152466(n) * (smallest prime factor of a(n)).

This conjecture has now been disproved: a(39) is a prime number. - Andrea Concaro, Dec 31 2022

Links

Andrea Concaro, Table of n, a(n) for n = 1..39

Example

A152466(1) = 252, a(1) = 252 + 1 = 253.

Crossrefs

Cf. A152466.

Sequence in context: A123013 A183449 A225021 * A271985 A255182 A176087

Adjacent sequences: A242460 A242461 A242462 * A242464 A242465 A242466

Keyword

nonn

Author

J. Lowell, May 15 2014

Status

approved