A063183 Number of nonisomorphic cyclic subgroups of the group S_n X S_n (where S_n is the symmetric group of degree n).

1, 1, 2, 4, 6, 11, 11, 20, 26, 37, 39, 59, 66, 97, 107, 120, 151, 203, 230, 303, 345, 381, 422, 542, 623, 737, 817, 963, 1074, 1328, 1480, 1798, 2097, 2275, 2518, 2702, 3071, 3630, 3973, 4295, 4770, 5614, 6253, 7294, 8020, 8676, 9421, 10913, 12136, 13577, 14871

Offset: 0

Author

Vladeta Jovovic, Jul 10 2001

Keywords

• nonn

Examples

			Set of orders of elements of S_8 X S_8 is {1,2,3,4,5,6,7,8,10,12,14,15,20,21,24, 28,30,35,40,42,56,60,70,84,105,120}, thus a(8) = 26.
		

Crossrefs

Cf. (labeled case) A063182.

Extensions

More terms from David Wasserman, Jul 10 2002

a(0)=1 prepended by Alois P. Heinz, Jan 01 2023