Number of length 1+3 0..n arrays with some pair in every consecutive four terms totalling exactly n.

A245951

Number of length 1+3 0..n arrays with some pair in every consecutive four terms totalling exactly n.

Terms

    a(0) =14a(1) =71a(2) =196a(3) =453a(4) =834a(5) =1435a(6) =2216a(7) =3305a(8) =4630a(9) =6351a(10) =8364a(11) =10861a(12) =13706a(13) =17123a(14) =20944a(15) =25425a(16) =30366a(17) =36055a(18) =42260a(19) =49301a(20) =56914a(21) =65451a(22) =74616a(23) =84793a(24) =95654a(25) =107615a(26) =120316a(27) =134205a(28) =148890a(29) =164851

External references