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A100288
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Primes of the form (1!)^2 + (2!)^2 + (3!)^2 +...+ (k!)^2.
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6
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OFFSET
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1,1
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COMMENTS
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Jonathan Vos Post contributed these numbers to Prime Curios.
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LINKS
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Table of n, a(n) for n=1..9.
G. L. Honaker, Jr. and C. Caldwell, Prime Curios!
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EXAMPLE
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41 = (1!)^2 + (2!)^2 + (3!)^2 is prime.
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PROG
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(PARI) lista(nn) = {my(s=1); for(k=2, nn, s+=(k!)^2; if(ispseudoprime(s), print1(s, ", "))); } \\ Jinyuan Wang, Mar 08 2020
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CROSSREFS
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Cf. A100289 (k such that (1!)^2 + (2!)^2 + (3!)^2 + ... + (k!)^2 is prime).
See also A061062, A104344.
Sequence in context: A246760 A073854 A104344 * A076094 A076131 A003719
Adjacent sequences: A100285 A100286 A100287 * A100289 A100290 A100291
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KEYWORD
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nonn,fini
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AUTHOR
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T. D. Noe, Nov 11 2004
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STATUS
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approved
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