A086352 Main diagonal of square array A086350.

1, 2, 10, 74, 740, 9354, 143144, 2573586, 53180944, 1242078802, 32358633632, 930370449370, 29264294868544, 999646208968666, 36852747307934336, 1458402092927302178, 61665517131334975744, 2774522039432235946914

Offset

0,2

Links

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

Formula

a(n) = ((1+sqrt(2))*(n+sqrt(2))^n-(1-sqrt(2))*(n-sqrt(2))^n)/sqrt(8).

Crossrefs

Cf. A000169, A086350.

Sequence in context: A289313 A092881 A004123 * A005365 A191812 A059104

Adjacent sequences: A086349 A086350 A086351 * A086353 A086354 A086355

Keyword

easy,nonn

Author

Paul Barry, Jul 18 2003

Status

approved