Number of 2Xn 0..1 arrays with no element equal to more than two of its horizontal, diagonal or antidiagonal neighbors and with new values introduced in order 0 sequentially upwards.
A281470
Number of 2Xn 0..1 arrays with no element equal to more than two of its horizontal, diagonal or antidiagonal neighbors and with new values introduced in order 0 sequentially upwards.
Terms
- a(0) =2a(1) =8a(2) =17a(3) =37a(4) =78a(5) =169a(6) =361a(7) =778a(8) =1673a(9) =3605a(10) =7774a(11) =16777a(12) =36241a(13) =78338a(14) =169465a(15) =366829a(16) =794550a(17) =1721977a(18) =3733929a(19) =8100666a(20) =17582281a(21) =38178181a(22) =82932878a(23) =180217513a(24) =391754433a(25) =851856306a(26) =1852865241a(27) =4031221917a(28) =8772754342a(29) =19095598617
External references
- oeis: A281470