Number of n X 5 0..1 arrays with every element unequal to 2, 3 or 5 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
A317868
Number of n X 5 0..1 arrays with every element unequal to 2, 3 or 5 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
Terms
- a(0) =0a(1) =4a(2) =4a(3) =88a(4) =220a(5) =759a(6) =3303a(7) =11807a(8) =45995a(9) =161983a(10) =600598a(11) =2215104a(12) =8089252a(13) =30099028a(14) =109674718a(15) =406751671a(16) =1486387672a(17) =5496201882a(18) =20148470577a(19) =74325953662a(20) =272963769305
External references
- oeis: A317868