A026942 a(n) = Sum_{k=0..n-3} T(n,k) * T(n,k+3), with T given by A026300.

4, 48, 469, 4222, 36715, 313912, 2661888, 22486072, 189688752, 1600198048, 13510004742, 114204762280, 966871825132, 8199071477920, 69645535691958, 592592023212504, 5050571335425668, 43114956743414712, 368632989326212821, 3156551837806702698

Offset

3,1

Links

Table of n, a(n) for n=3..22.

Crossrefs

Sequence in context: A298842 A298649 A299603 * A264727 A283049 A159903

Adjacent sequences: A026939 A026940 A026941 * A026943 A026944 A026945

Keyword

nonn

Author

Clark Kimberling

Extensions

More terms from Sean A. Irvine, Oct 17 2019

Status

approved