Number of nX5 0..4 arrays with each element equal to the number its horizontal and vertical neighbors equal to itself.

A195966

Number of nX5 0..4 arrays with each element equal to the number its horizontal and vertical neighbors equal to itself.

Terms

    a(0) =1a(1) =1a(2) =14a(3) =48a(4) =193a(5) =417a(6) =804a(7) =2745a(8) =9547a(9) =24176a(10) =61074a(11) =170047a(12) =498749a(13) =1412003a(14) =3830458a(15) =10425200a(16) =29408888a(17) =82593837a(18) =229097068a(19) =632720280a(20) =1758152920a(21) =4903602060a(22) =13659767887a(23) =37909433089a(24) =105292824517a(25) =292891120663

External references