T(n,k)=Number of nXk 0..1 arrays with every element equal to 0, 1 or 3 horizontally or vertically adjacent elements, with upper left element zero.

A301541

T(n,k)=Number of nXk 0..1 arrays with every element equal to 0, 1 or 3 horizontally or vertically adjacent elements, with upper left element zero.

Terms

    a(0) =1a(1) =2a(2) =2a(3) =3a(4) =3a(5) =3a(6) =5a(7) =6a(8) =6a(9) =5a(10) =8a(11) =10a(12) =9a(13) =10a(14) =8a(15) =13a(16) =21a(17) =26a(18) =26a(19) =21a(20) =13a(21) =21a(22) =42a(23) =61a(24) =79a(25) =61a(26) =42a(27) =21a(28) =34a(29) =86

External references