A130807 Prime p > a(n-1) such that p + n! is prime, starting with a(1) = 2.

2, 3, 5, 7, 11, 13, 19, 23, 31, 41, 59, 83, 109, 127, 149, 163, 167, 173, 241, 271, 317, 397, 401, 461, 463, 577, 607, 653, 683, 739, 797, 857, 883, 887, 941, 1093, 1327, 1601, 1949, 2281, 2383, 2593, 2647, 2753, 2953, 3067, 3089, 3469, 3533, 3709

Offset

1,1

Links

Table of n, a(n) for n=1..50.

Prog

(PARI) lista(nn) = my(va=vector(nn)); va[1] = 2; for (n=2, nn, my(p=nextprime(va[n-1]+1)); while (!ispseudoprime(p+n!), p = nextprime(p+1)); va[n] = p; ); va; \\ Michel Marcus, Mar 15 2023

Crossrefs

See A105049 for another version.

Sequence in context: A215642 A092581 A362527 * A338577 A030145 A285983

Adjacent sequences: A130804 A130805 A130806 * A130808 A130809 A130810

Keyword

easy,nonn

Author

Giovanni Teofilatto, Aug 20 2007

Extensions

Edited and extended by T. D. Noe, Aug 23 2007

Name clarified by Michel Marcus, Mar 15 2023

Status

approved