Number of 2Xn 0..1 arrays with every element equal to 0, 1, 2 or 4 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
A302323
Number of 2Xn 0..1 arrays with every element equal to 0, 1, 2 or 4 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
Terms
- a(0) =2a(1) =8a(2) =20a(3) =52a(4) =136a(5) =360a(6) =960a(7) =2576a(8) =6944a(9) =18784a(10) =50944a(11) =138432a(12) =376704a(13) =1026176a(14) =2797568a(15) =7631104a(16) =20824576a(17) =56845824a(18) =155209728a(19) =423848960a(20) =1157593088a(21) =3161835520a(22) =8636760064a(23) =23592996864a(24) =64451125248a(25) =176071467008a(26) =481011630080
External references
- oeis: A302323