Number of 2X2X2 triangular 0..n arrays with some element plus some adjacent element totalling n+1, n or n-1 exactly once.

A270851

Number of 2X2X2 triangular 0..n arrays with some element plus some adjacent element totalling n+1, n or n-1 exactly once.

Terms

    a(0) =0a(1) =0a(2) =6a(3) =24a(4) =66a(5) =120a(6) =198a(7) =288a(8) =402a(9) =528a(10) =678a(11) =840a(12) =1026a(13) =1224a(14) =1446a(15) =1680a(16) =1938a(17) =2208a(18) =2502a(19) =2808a(20) =3138a(21) =3480a(22) =3846a(23) =4224a(24) =4626a(25) =5040a(26) =5478a(27) =5928a(28) =6402a(29) =6888

External references