Number of n X 4 0..1 arrays with every element equal to 1, 2 or 4 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

A302274

Number of n X 4 0..1 arrays with every element equal to 1, 2 or 4 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

Terms

    a(0) =2a(1) =10a(2) =29a(3) =89a(4) =353a(5) =941a(6) =3316a(7) =12016a(8) =34060a(9) =120940a(10) =415304a(11) =1257949a(12) =4395268a(13) =14710881a(14) =46444038a(15) =159674287a(16) =528683443a(17) =1709740974a(18) =5804427370a(19) =19154720511a(20) =62771586925a(21) =211230338251a(22) =697032878924

External references