0,2

a(n) = A072256(n+1);

(sqrt(2)+sqrt(3))^(2*n+1)=A054320(n-1)*sqrt(2)+a(n)*sqrt(3).

a(n) = 10*a(n-1) - a(n-2)) for n > 1;

a(n) = A001079(n) + 2*A001078(n).

Cf. A138281.

Adjacent sequences: A138285 A138286 A138287 this_sequence A138289 A138290 A138291

Sequence in context: A133486 A015584 A072256 this_sequence A059482 A109002 A142991

nonn

Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Mar 12 2008