A027857 Number of positive divisors of n!, read mod n.

0, 0, 1, 0, 1, 0, 4, 0, 7, 0, 1, 0, 11, 2, 12, 0, 8, 0, 2, 0, 5, 14, 19, 0, 7, 4, 0, 0, 20, 0, 7, 0, 24, 22, 2, 0, 11, 6, 9, 0, 10, 0, 24, 4, 0, 30, 21, 0, 45, 30, 12, 0, 40, 0, 30, 0, 39, 32, 50, 0, 28, 52, 18, 0, 59, 0, 25, 24, 15, 0, 40, 0, 59, 48, 15, 0, 23, 0, 62, 0, 54, 0, 69, 0, 80

Offset

1,7

Links

Table of n, a(n) for n=1..85.

Mathematica

Table[Mod[DivisorSigma[0, n!], n], {n, 90}] (* Harvey P. Dale, Sep 20 2011 *)

Crossrefs

Cf. A027423.

Sequence in context: A222832 A279871 A223052 * A366408 A052400 A354450

Adjacent sequences: A027854 A027855 A027856 * A027858 A027859 A027860

Keyword

nonn

Author

Leroy Quet.

Extensions

More terms from James A. Sellers

Status

approved