Number of nX3 0..1 arrays with every element equal to 0, 1, 4, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
A303309
Number of nX3 0..1 arrays with every element equal to 0, 1, 4, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
Terms
- a(0) =3a(1) =3a(2) =12a(3) =11a(4) =19a(5) =34a(6) =53a(7) =83a(8) =136a(9) =223a(10) =359a(11) =578a(12) =937a(13) =1519a(14) =2456a(15) =3971a(16) =6427a(17) =10402a(18) =16829a(19) =27227a(20) =44056a(21) =71287a(22) =115343a(23) =186626a(24) =301969a(25) =488599a(26) =790568a(27) =1279163a(28) =2069731a(29) =3348898
External references
- oeis: A303309