1/36 the number of (n+2)X5 0..2 arrays with each 3X3 subblock containing two of one value, two of another, and five of the last.

A184451

1/36 the number of (n+2)X5 0..2 arrays with each 3X3 subblock containing two of one value, two of another, and five of the last.

Terms

    a(0) =864a(1) =1591a(2) =3125a(3) =6880a(4) =20706a(5) =67180a(6) =232326a(7) =967138a(8) =4023354a(9) =16410550a(10) =76004286a(11) =342234442a(12) =1471593474a(13) =7091681506a(14) =32977550190a(15) =145061691070a(16) =712044245886

External references