Number of 3Xn 0..1 arrays with every element equal to 0, 2, 3, 4 or 5 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
A302890
Number of 3Xn 0..1 arrays with every element equal to 0, 2, 3, 4 or 5 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
Terms
- a(0) =4a(1) =2a(2) =37a(3) =53a(4) =197a(5) =818a(6) =2548a(7) =10926a(8) =42671a(9) =176119a(10) =742413a(11) =3138038a(12) =13445806a(13) =57784846a(14) =249318271a(15) =1078199427a(16) =4668892009a(17) =20238323768a(18) =87777824464a(19) =380862666946
External references
- oeis: A302890