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A303738 Primes of form (2*k)! + k! - 1. 1
2, 40343, 371993326789901217467999454553208905727999 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
a(4) has 154 digits and is too large to be included.
LINKS
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
Sequence in context: A272166 A291881 A257968 * A055578 A232733 A106025
KEYWORD
nonn
AUTHOR
Muniru A Asiru, May 27 2018
STATUS
approved

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Last modified May 29 04:26 EDT 2024. Contains 372921 sequences. (Running on oeis4.)