A110094 Startorial primes.

2, 3, 5, 7, 23, 719, 5039, 1451521, 2903041, 5806081, 46448639, 92897281, 371589121, 10032906239, 30098718719, 270888468479, 812665405439, 7313988648961, 21941965946881, 89874292518420479

Offset

1,1

Comments

These are primes of the form A109834 startorials (base 10) +1 or -1. This is by analogy to factorial primes (A002981), superfactorial primes (A073828), hyperfactorial primes, ultrafactorial primes (comment in A046882), subfactorial primes (A100015), double factorial primes (A080778), multifactorial primes (A037083).

Links

Table of n, a(n) for n=1..20.

Formula

{a(n)} = {A109834(k)+1 an element of A000040, or A109834(k)-1 an element of A000040, for some k}.

Crossrefs

Cf. A000040, A002981, A073828, A080778, A037083, A100015, A103317, A046882, A109834.

Sequence in context: A360497 A368805 A262339 * A088054 A249509 A085907

Adjacent sequences: A110091 A110092 A110093 * A110095 A110096 A110097

Keyword

base,easy,nonn

Author

Jonathan Vos Post, Sep 04 2005

Status

approved