A026113 T(3n,n), where T is the array defined in A026105.

1, 2, 15, 112, 879, 7084, 58123, 482980, 4051542, 34236670, 291001515, 2485209984, 21308128100, 183304844334, 1581390987039, 13676468811804, 118533903449357, 1029280548493050, 8952719328878815, 77988115665259800, 680280714418808610, 5941248392350208706

Offset

0,2

Links

Table of n, a(n) for n=0..21.

Crossrefs

Cf. A026105.

Sequence in context: A140637 A342963 A022026 * A052874 A360432 A376327

Adjacent sequences: A026110 A026111 A026112 * A026114 A026115 A026116

Keyword

nonn

Author

Clark Kimberling

Extensions

a(13) corrected and more terms from Sean A. Irvine, Sep 16 2019

Status

approved