Number of nX4 0..1 arrays with every element equal to 0, 1, 2, 4, 5 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
A301487
Number of nX4 0..1 arrays with every element equal to 0, 1, 2, 4, 5 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
Terms
- a(0) =8a(1) =50a(2) =148a(3) =599a(4) =2354a(5) =9415a(6) =38558a(7) =158994a(8) =657238a(9) =2721509a(10) =11274883a(11) =46736042a(12) =193836729a(13) =804279754a(14) =3338261393a(15) =13859019181a(16) =57545314726a(17) =238962743161a(18) =992381007429
External references
- oeis: A301487