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A026333 a(n) = T(3n,n), where T is the array in A026323. 0
1, 3, 21, 156, 1221, 9828, 80579, 669273, 5612505, 47416278, 402953376, 3440825160, 29498259546, 253737784446, 2188855109385, 18928808608996, 164046653525181 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..16.

CROSSREFS

Sequence in context: A074575 A091171 A226560 * A205773 A192364 A286918

Adjacent sequences:  A026330 A026331 A026332 * A026334 A026335 A026336

KEYWORD

nonn

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified September 15 22:10 EDT 2019. Contains 327088 sequences. (Running on oeis4.)