Number of nX4 0..1 arrays with every element equal to 1, 2 or 4 horizontally or vertically adjacent elements, with upper left element zero.
A301665
Number of nX4 0..1 arrays with every element equal to 1, 2 or 4 horizontally or vertically adjacent elements, with upper left element zero.
Terms
- a(0) =2a(1) =23a(2) =118a(3) =564a(4) =2793a(5) =14394a(6) =71564a(7) =359659a(8) =1808256a(9) =9076074a(10) =45607585a(11) =229124216a(12) =1151098126a(13) =5783024867a(14) =29053401570a(15) =145961054556a(16) =733293062029
External references
- oeis: A301665