A086352 - OEIS

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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

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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