A138463 A bisection of A006318.

2, 22, 394, 8558, 206098, 5293446, 142078746, 3937603038, 111818026018, 3236724317174, 95149655201962

Offset

0,1

Links

Table of n, a(n) for n=0..10.

Formula

a(n)=A006318(2n+1).

D-finite with recurrence +(n+1)*(2*n+1)*a(n) +(-70*n^2+3*n+4)*a(n-1) +(70*n^2-207*n+149)*a(n-2) -(n-2)*(2*n-5)*a(n-3)=0. - R. J. Mathar, Mar 25 2024

Maple

A138463 := proc(n)
    A006318(2*n+1) ;
end proc:
seq(A138463(n), n=0..50) ; # R. J. Mathar, Mar 25 2024

Crossrefs

Sequence in context: A111985 A378743 A265860 * A007842 A287595 A201511

Adjacent sequences: A138460 A138461 A138462 * A138464 A138465 A138466

Keyword

nonn

Author

N. J. A. Sloane, May 08 2008

Status

approved