A026333 a(n) = T(3n,n), where T is the array in A026323.

1, 3, 21, 156, 1221, 9828, 80579, 669273, 5612505, 47416278, 402953376, 3440825160, 29498259546, 253737784446, 2188855109385, 18928808608996, 164046653525181

Offset

0,2

Links

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

Crossrefs

Sequence in context: A074575 A091171 A226560 * A370170 A205773 A192364

Adjacent sequences: A026330 A026331 A026332 * A026334 A026335 A026336

Keyword

nonn

Author

Clark Kimberling

Status

approved