Number of nX3 0..1 arrays with every element unequal to 0, 1, 2, 3, 6, 7 or 8 king-move adjacent elements, with upper left element zero.
A317225
Number of nX3 0..1 arrays with every element unequal to 0, 1, 2, 3, 6, 7 or 8 king-move adjacent elements, with upper left element zero.
Terms
- a(0) =4a(1) =21a(2) =46a(3) =150a(4) =488a(5) =1468a(6) =4626a(7) =14720a(8) =45811a(9) =143798a(10) =453581a(11) =1423094a(12) =4469903a(13) =14063611a(14) =44197158a(15) =138899518a(16) =436737933a(17) =1372924949a(18) =4315682539a(19) =13567748610a(20) =42653241731a(21) =134086614407a(22) =421533391249
External references
- oeis: A317225