A026303 a(n) = T(3n,n), where T is the array in A026300.

1, 3, 20, 147, 1143, 9163, 74919, 621015, 5199909, 43878315, 372530781, 3178551148, 27231924300, 234113134518, 2018601251793, 17449264269081, 151169392399773

Offset

0,2

Links

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

Crossrefs

Sequence in context: A074573 A068571 A074569 * A154627 A320350 A354495

Adjacent sequences: A026300 A026301 A026302 * A026304 A026305 A026306

Keyword

nonn

Author

Clark Kimberling

Status

approved