A063101 a(n) is the number of divisors of n!*(n! + 1)/2.

1, 1, 2, 4, 18, 36, 96, 144, 336, 1120, 960, 960, 4320, 5760, 9504, 29568, 161280, 80640, 884736, 110592, 155520, 460800, 729600, 2188800, 929280, 1300992, 2040192, 1298304, 3528000, 14112000, 71884800, 71884800, 85708800, 243793920

Offset: 0

Author

Jason Earls, Aug 07 2001

Keywords

• nonn

Links

• Harry J. Smith, Table of n, a(n) for n = 0..60

Crossrefs

Cf. A055555.

Programs

PARI

a(n)={numdiv(n!*(n! + 1)/2)}