T(n,k)=Number of nXk 0..5 arrays with some element plus some horizontally or vertically adjacent neighbor totalling five exactly once.

A269767

T(n,k)=Number of nXk 0..5 arrays with some element plus some horizontally or vertically adjacent neighbor totalling five exactly once.

Terms

    a(0) =0a(1) =6a(2) =6a(3) =60a(4) =480a(5) =60a(6) =450a(7) =17520a(8) =17520a(9) =450a(10) =3000a(11) =524160a(12) =2624640a(13) =524160a(14) =3000a(15) =18750a(16) =14288400a(17) =326697720a(18) =326697720a(19) =14288400a(20) =18750a(21) =112500a(22) =368958240a(23) =37212131520a(24) =170119348800a(25) =37212131520a(26) =368958240a(27) =112500a(28) =656250a(29) =9195061680

External references