A085477 Numbers n such that there is at least one k dividing (n-1)!-1 (n<=k<=2n).

1, 2, 4, 6, 10, 12, 16, 18, 22, 28, 30, 36, 38, 40, 42, 43, 45, 46, 47, 49, 52, 53, 54, 56, 58, 60, 66, 68, 70, 72, 76, 78, 82, 84, 88, 96, 97, 99, 100, 102, 106, 108, 110, 112, 118, 120, 121, 123, 124, 126, 130, 132, 136, 138, 142, 148, 150, 154, 156, 162, 166, 169, 172

Offset

1,2

Links

Table of n, a(n) for n=1..63.

Prog

(PARI) for(n=1, 250, if(sum(k=n, 2*n, if(((n-1)!-1)%k, 0, 1))>0, print1(n, ", ")))

Crossrefs

Cf. A085468 (odd terms).

Sequence in context: A161842 A249434 A249425 * A128984 A249427 A075728

Adjacent sequences: A085474 A085475 A085476 * A085478 A085479 A085480

Keyword

nonn

Author

Benoit Cloitre, Aug 14 2003

Status

approved