Number of length 2+3 0..n arrays with some pair in every consecutive four terms totalling exactly n.

A245952

Number of length 2+3 0..n arrays with some pair in every consecutive four terms totalling exactly n.

Terms

    a(0) =26a(1) =197a(2) =676a(3) =1889a(4) =3966a(5) =7669a(6) =13064a(7) =21281a(8) =32290a(9) =47621a(10) =67116a(11) =92737a(12) =124166a(13) =163829a(14) =211216a(15) =269249a(16) =337194a(17) =418501a(18) =512180a(19) =622241a(20) =747406a(21) =892277a(22) =1055256a(23) =1241569a(24) =1449266a(25) =1684229a(26) =1944124a(27) =2235521a(28) =2555670a(29) =2911861

External references