A083090 Main diagonal of table A083087.

1, 5, 25, 90, 247, 766, 2258, 5860, 16526, 45639, 124043, 313327, 837221, 2216256, 5545541, 14524810, 37810204, 97907017, 242993558, 625252309, 1602714963, 3962518559, 10109705767, 25718726896, 63402237401, 160711911464

Offset

0,2

Links

Table of n, a(n) for n=0..25.

Formula

a(n) = T(n, n), where T(n, 0) = floor(n*x/(x-1)) + 1, T(n, k+1) = ceiling(x*T(n, k)), for n >= 0, k >= 0, where x = 1+sqrt(2).

Crossrefs

Cf. A083087, A083044, A083047, A083050.

Sequence in context: A147034 A146460 A223840 * A224148 A265929 A297452

Adjacent sequences: A083087 A083088 A083089 * A083091 A083092 A083093

Keyword

nonn

Author

Paul D. Hanna, Apr 22 2003

Status

approved