Number of nX7 0..1 arrays with every element equal to 0, 1 or 3 horizontally or vertically adjacent elements, with upper left element zero.
A301540
Number of nX7 0..1 arrays with every element equal to 0, 1 or 3 horizontally or vertically adjacent elements, with upper left element zero.
Terms
- a(0) =21a(1) =86a(2) =374a(3) =1841a(4) =9037a(5) =47791a(6) =255406a(7) =1432328a(8) =8145489a(9) =46701775a(10) =269741883a(11) =1568279203a(12) =9153838956a(13) =53577605791a(14) =314145731065
External references
- oeis: A301540