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A083090 Main diagonal of table A083087. 1
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 (list; graph; refs; listen; history; text; internal format)
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

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Last modified May 24 01:46 EDT 2022. Contains 353993 sequences. (Running on oeis4.)