A026293 a(n) = T(3n,n), where T is the array in A026268.

1, 2, 14, 106, 834, 6732, 55289, 459742, 3858524, 32618022, 277326906, 2369003910, 20315879480, 174798617778, 1508225204024, 13045333585950, 113076177711662, 981982906771978, 8542048596893910, 74416362792323370, 649168980344148876, 5669882132589477798

Offset

0,2

Links

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

Crossrefs

Sequence in context: A279737 A122680 A121122 * A051708 A355362 A074618

Adjacent sequences: A026290 A026291 A026292 * A026294 A026295 A026296

Keyword

nonn

Author

Clark Kimberling

Extensions

a(5) corrected and more terms from Sean A. Irvine, Sep 24 2019

Status

approved