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A300947 Primes of form (2*k)! + k! + 1. 4
3, 727, 20922789928321, 403291461126605641811020801, 523022617466601111760007224221719391608832001 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

The next term is too large to include.

LINKS

Table of n, a(n) for n=1..5.

FORMULA

a(n) = (2*A242487(n))! + A242487(n)! + 1.

MAPLE

select(isprime, [seq(factorial(2*k)+factorial(k)+1, k=0..600)]); # Muniru A Asiru, May 27 2018

PROG

(PARI) lista(nn) = {for(k=0, nn, if(ispseudoprime(p=(2*k)!+k!+1), print1(p, ", "))); } \\ Altug Alkan, Mar 22 2018

CROSSREFS

Cf. A088332, A118812, A242487.

Sequence in context: A231604 A306961 A059120 * A013826 A255012 A133014

Adjacent sequences:  A300944 A300945 A300946 * A300948 A300949 A300950

KEYWORD

nonn

AUTHOR

Seiichi Manyama, Mar 22 2018

STATUS

approved

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Last modified October 18 05:26 EDT 2019. Contains 328146 sequences. (Running on oeis4.)