A303738 Primes of form (2*k)! + k! - 1.

2, 40343, 371993326789901217467999454553208905727999

Offset

1,1

Comments

a(4) has 154 digits and is too large to be included.

Links

Table of n, a(n) for n=1..3.

Formula

a(n) = (2*A303737(n))! + A303737(n)! - 1.

Maple

f:=factorial: select(isprime, [seq(f(2*k)+f(k)-1, k=1..600)]);

Crossrefs

Cf. A242487, A300947, A303737.

Sequence in context: A272166 A291881 A257968 * A055578 A232733 A106025

Adjacent sequences: A303735 A303736 A303737 * A303739 A303740 A303741

Keyword

nonn

Author

Muniru A Asiru, May 27 2018

Status

approved