A134486 a(0)=1; for n>=1, a(n) = the largest prime dividing n*a(n-1) + 1.

1, 2, 5, 2, 3, 2, 13, 23, 37, 167, 557, 383, 4597, 29881, 167, 179, 191, 29, 523, 4969, 211, 277, 53, 61, 293, 37, 107, 17, 53, 769, 23071, 661, 641, 1511, 137, 109, 157, 83, 631, 107, 1427, 14627, 122867, 103, 1511, 191, 101, 1187, 251, 41, 293, 467, 1619

Offset

0,2

Links

Table of n, a(n) for n=0..52.

Mathematica

a = {1, 2}; Do[AppendTo[a, FactorInteger[Length[a]*a[[ -1]] + 1][[ -1, 1]]], {70}]; a (* Stefan Steinerberger, Oct 30 2007 *)

Crossrefs

Similar to A134487 but with different value of a(0).

Sequence in context: A049413 A300691 A102707 * A088006 A078311 A132743

Adjacent sequences: A134483 A134484 A134485 * A134487 A134488 A134489

Keyword

nonn

Author

Leroy Quet, Oct 28 2007

Extensions

More terms from Stefan Steinerberger, Oct 30 2007

Status

approved