A026876 T(2n+1, n+1), T given by A026758.

1, 3, 11, 43, 174, 721, 3042, 13022, 56420, 246977, 1090846, 4856162, 21770665, 98217318, 445634370, 2032434475, 9313305870, 42861416044, 198038717055, 918368326483, 4273103732070, 19944292913477, 93356009312511, 438150836819153

Offset

0,2

Comments

The invert transform of this sequences (shifted) appears to be A165538 (conjectured). - Michael D. Weiner, Aug 04 2018

Links

Table of n, a(n) for n=0..23.

Formula

G.f. f satisfies: x^6*f^4 + x^3*(4*x-1)*(x-1)*f^3 + x*(x-1)*(6*x^2-6*x+1)*f^2 + (4*x-1)*(x-1)^2*f + (x-1)^2 = 0 (conjectured). - Michael D. Weiner, Aug 04 2018

Crossrefs

Cf. A026758, A165538.

Sequence in context: A007583 A356281 A026671 * A270447 A151090 A059278

Adjacent sequences: A026873 A026874 A026875 * A026877 A026878 A026879

Keyword

nonn

Author

Clark Kimberling

Status

approved