

A165451


Sum of factorial of digits is prime.


4



2, 10, 11, 12, 13, 20, 21, 30, 31, 100, 101, 110, 111, 122, 133, 134, 135, 136, 143, 153, 155, 163, 178, 187, 202, 212, 220, 221, 303, 304, 305, 306, 313, 314, 315, 316, 330, 331, 340, 341, 350, 351, 360, 361, 403, 413, 430, 431, 503, 505, 513, 515, 530, 531
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OFFSET

1,1


LINKS

Table of n, a(n) for n=1..54.


EXAMPLE

1!+3!+5! = 127 and 127 is prime, so 135 appears in the sequence.


PROG

(PARI) digfac(n)=local(s=0); while(n, s=s+((n%10)!); n=n\10); return(s) for(n=1, 1000, if(isprime(digfac(n)), print1(n, ", ")))


CROSSREFS

Cf. A061602.
Sequence in context: A171893 A278816 A043072 * A121717 A217072 A106518
Adjacent sequences: A165448 A165449 A165450 * A165452 A165453 A165454


KEYWORD

easy,nonn,base


AUTHOR

Rémy Sigrist, Sep 20 2009


STATUS

approved



