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A289564
Primes of the form k!4+512, where k!4 is the quadruple factorial number (A007662).
1
557, 743, 1097, 10457, 66347, 209357, 151413137, 1267390097, 4996617137, 44358635987, 2442358029135994033940387, 654019644904558303836431802744185605453637, 7767791322531438974665300521192692435966766137
OFFSET
1,1
COMMENTS
The next term has 190 digits. - Harvey P. Dale, Aug 02 2022
LINKS
MATHEMATICA
MultiFactorial[n_, k_] := If[n<1, 1, n*MultiFactorial[n-k, k]];
Select[Table[MultiFactorial[i, 4] + 512, {i, 0, 100}], PrimeQ[#]&]
Select[Table[Times@@Range[n, 1, -4]+512, {n, 200}], PrimeQ] (* Harvey P. Dale, Aug 02 2022 *)
CROSSREFS
Cf. A291350.
Sequence in context: A233355 A371879 A177331 * A319061 A339533 A344828
KEYWORD
nonn
AUTHOR
Robert Price, Sep 02 2017
STATUS
approved