Number of nX4 0..1 arrays with every element equal to 0, 1, 3 or 5 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
A302423
Number of nX4 0..1 arrays with every element equal to 0, 1, 3 or 5 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
Terms
- a(0) =5a(1) =17a(2) =21a(3) =42a(4) =148a(5) =362a(6) =879a(7) =2447a(8) =6306a(9) =15905a(10) =42221a(11) =110418a(12) =283913a(13) =742439a(14) =1940186a(15) =5029913a(16) =13102975a(17) =34178122a(18) =88873888a(19) =231355589a(20) =602826384a(21) =1569061436a(22) =4084569987a(23) =10637783556a(24) =27695951899a(25) =72104297278a(26) =187752963431
External references
- oeis: A302423