Number of n X 4 0..1 arrays with every element equal to 0, 1, 2 or 5 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
A302411
Number of n X 4 0..1 arrays with every element equal to 0, 1, 2 or 5 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
Terms
- a(0) =8a(1) =37a(2) =66a(3) =259a(4) =994a(5) =3548a(6) =12442a(7) =46066a(8) =166341a(9) =602444a(10) =2183411a(11) =7921498a(12) =28715036a(13) =104088155a(14) =377401980a(15) =1368277734a(16) =4960546524a(17) =17984375837a(18) =65202131367a(19) =236388514292a(20) =857019649393
External references
- oeis: A302411