Number of 3Xn arrays containing n copies of 0..3-1 with row sums equal, column sums equal and full-length antidiagonal sums equal to the short dimension sums.

A265118

Number of 3Xn arrays containing n copies of 0..3-1 with row sums equal, column sums equal and full-length antidiagonal sums equal to the short dimension sums.

Terms

    a(0) =0a(1) =0a(2) =8a(3) =6a(4) =10a(5) =26a(6) =42a(7) =70a(8) =150a(9) =282a(10) =506a(11) =1002a(12) =1950a(13) =3670a(14) =7126a(15) =13926a(16) =26826a(17) =52082a(18) =101802a(19) =198146a(20) =386238a(21) =755790a(22) =1478302a(23) =2892442a(24) =5670210a(25) =11122230a(26) =21823494a(27) =42863862a(28) =84247842a(29) =165655146

External references