A026954 a(n) = Sum_{k=0..n-3} T(n,k) * T(n,k+3), with T given by A026386.

1, 10, 83, 452, 3171, 14700, 97482, 422544, 2730615, 11442786, 72932904, 299882916, 1895949055, 7706754370, 48478715240, 195623710160, 1226501910315, 4925351886030, 30811853728475, 123326259948044, 770315837004637, 3076174085773624, 19193549752057758, 76523420240817792

Offset

3,2

Links

Table of n, a(n) for n=3..26.

Crossrefs

Sequence in context: A339689 A238843 A360698 * A116879 A154340 A037699

Adjacent sequences: A026951 A026952 A026953 * A026955 A026956 A026957

Keyword

nonn

Author

Clark Kimberling

Extensions

More terms from Sean A. Irvine, Oct 18 2019

Status

approved