A162080 Number of n X n symmetric 0..4 arrays with rows, considered as 5-ary numbers, in nondecreasing order.

5, 65, 2885, 492545, 340022021, 980195178305, 12095799705910085, 651547912318129391105, 155578901160322401759995909, 166731137713145923166606394940481

Offset

1,1

Links

R. H. Hardin, Table of n, a(n) for n=1..12

Crossrefs

Sequence in context: A247540 A171800 A195244 * A012476 A195516 A167536

Adjacent sequences: A162077 A162078 A162079 * A162081 A162082 A162083

Keyword

nonn

Author

R. H. Hardin, Jun 25 2009

Status

approved