A086406 Main diagonal of number array A086404.

1, 2, 11, 84, 857, 10984, 169803, 3076688, 63968273, 1501465248, 39277112843, 1133193163840, 35748951528681, 1224258310112384, 45233097633685643, 1793524939926112512, 75966131556225961121, 3423203234058532082176

Offset

0,2

Links

Table of n, a(n) for n=0..17.

Formula

a(n)=(n-sqrt(3))^n(1/2-sqrt(3)/6)+(n+sqrt(3))^n(1/2+sqrt(3)/6)

Crossrefs

Cf. A086352.

Sequence in context: A363563 A279202 A379189 * A158098 A104185 A074604

Adjacent sequences: A086403 A086404 A086405 * A086407 A086408 A086409

Keyword

easy,nonn

Author

Paul Barry, Jul 19 2003

Status

approved