Number of length 6+3 0..n arrays with no pair in any consecutive four terms totalling exactly n.

A246485

Number of length 6+3 0..n arrays with no pair in any consecutive four terms totalling exactly n.

Terms

    a(0) =2a(1) =52a(2) =3132a(3) =31104a(4) =347934a(5) =1893780a(6) =9714968a(7) =35251360a(8) =119069850a(9) =331355220a(10) =869135892a(11) =2019732192a(12) =4480392182a(13) =9156814324a(14) =18041010864a(15) =33514806720a(16) =60460359858a(17) =104364198900a(18) =175893704300a(19) =286474229440a(20) =457427541582

External references