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A026303 a(n) = T(3n,n), where T is the array in A026300. 3
1, 3, 20, 147, 1143, 9163, 74919, 621015, 5199909, 43878315, 372530781, 3178551148, 27231924300, 234113134518, 2018601251793, 17449264269081, 151169392399773 (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: A074573 A068571 A074569 * A154627 A320350 A091172

Adjacent sequences:  A026300 A026301 A026302 * A026304 A026305 A026306

KEYWORD

nonn

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified January 18 23:05 EST 2019. Contains 319282 sequences. (Running on oeis4.)