A192467 (A192466)/2.

1, 3, 12, 45, 176, 693, 2752, 10965, 43776, 174933, 699392, 2796885, 11186176, 44741973, 178962432, 715838805, 2863333376, 11453289813, 45813071872, 183252112725, 733008101376, 2932031706453, 11728125427712, 46912498914645, 187649990066176

Offset

1,2

Comments

See A192466.

Links

Table of n, a(n) for n=1..25.

Formula

Empirical G.f.: -x*(x^2-3*x+1)/((x-1)*(x+1)*(2*x-1)*(4*x-1)). [Colin Barker, Nov 12 2012]

Example

(See A192466.)

Mathematica

(See A192465.)

Crossrefs

Cf. A192466.

Sequence in context: A085481 A030195 A114515 * A151162 A094547 A026559

Adjacent sequences: A192464 A192465 A192466 * A192468 A192469 A192470

Keyword

nonn

Author

Clark Kimberling, Jul 01 2011

Status

approved