Number of nX4 0..1 arrays with every element equal to 0, 1, 3, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
A303193
Number of nX4 0..1 arrays with every element equal to 0, 1, 3, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
Terms
- a(0) =5a(1) =17a(2) =23a(3) =46a(4) =185a(5) =497a(6) =1357a(7) =4207a(8) =12167a(9) =34473a(10) =102325a(11) =299504a(12) =863917a(13) =2529911a(14) =7401255a(15) =21512919a(16) =62790998a(17) =183429084a(18) =534568781a(19) =1559375192a(20) =4551720900a(21) =13275818353a(22) =38726475676a(23) =113002176247a(24) =329660705673a(25) =961703508351
External references
- oeis: A303193