A085485 First row of symmetric square table A085484, in which the main diagonal is equal to the first row shift left.

1, 1, 2, 8, 40, 224, 1368, 9008, 63488, 476160, 3781512, 31664480, 278523280, 2565244096, 24668577152, 247071942208, 2571604628416, 27760448819328, 310253989126552, 3584085550894352, 42734147997935968, 525204685346228320, 6645209549379186000

Offset

0,3

Links

Table of n, a(n) for n=0..22.

Crossrefs

Cf. A085484 (table), A085486 (antidiagonal sums).

Sequence in context: A177408 A289431 A337912 * A089603 A343146 A209358

Adjacent sequences: A085482 A085483 A085484 * A085486 A085487 A085488

Keyword

nonn

Author

Paul D. Hanna, Jul 02 2003

Extensions

More terms from Sean A. Irvine, Jun 20 2026

Status

approved