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A192467 (A192466)/2. 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 (list; graph; refs; listen; history; text; internal format)
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

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Last modified September 27 08:39 EDT 2021. Contains 347689 sequences. (Running on oeis4.)