Number of nX3 0..1 arrays with every element unequal to 1, 2, 3 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
A318425
Number of nX3 0..1 arrays with every element unequal to 1, 2, 3 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
Terms
- a(0) =1a(1) =16a(2) =36a(3) =147a(4) =417a(5) =1353a(6) =4095a(7) =12853a(8) =39489a(9) =123210a(10) =380280a(11) =1182026a(12) =3659119a(13) =11351061a(14) =35179874a(15) =109070933a(16) =338113844a(17) =1048217069a(18) =3249453631a(19) =10073853147a(20) =31229167798a(21) =96814146538a(22) =300130174990a(23) =930430509302
External references
- oeis: A318425