A240161 Numbers n such that (k!-n)/k is prime for some k.
4, 5, 7, 8, 12, 13, 15, 16, 25, 31, 33, 34, 35, 39, 42, 55, 65, 66, 77, 78, 85, 95, 102, 105, 110, 114, 121, 130, 133, 136, 138, 152, 156, 167, 169, 170, 186, 187, 203, 204, 221, 222, 232, 246, 248, 253, 255, 259, 279, 282, 290, 294, 296, 301, 318, 322, 325, 328, 329, 333, 354, 366
Offset: 1
Keywords
Links
- Jens Kruse Andersen, Table of n, a(n) for n = 1..300
Programs
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PARI
a(n)=for(k=1,n,s=(k!-n)/k;if(floor(s)==s,if(ispseudoprime(s),return(k)))) n=1;while(n<500,if(a(n),print1(n,", "));n++)
Comments