Number of nX3 0..1 arrays with every element equal to 0, 1, 3 or 5 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
A302422
Number of nX3 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) =3a(1) =9a(2) =11a(3) =21a(4) =51a(5) =93a(6) =207a(7) =517a(8) =1007a(9) =2333a(10) =5847a(11) =11781a(12) =27055a(13) =66861a(14) =137895a(15) =314197a(16) =766367a(17) =1610429a(18) =3649239a(19) =8799333a(20) =18772687a(21) =42381645a(22) =101181063a(23) =218513269a(24) =492148223a(25) =1164905693a(26) =2540589879a(27) =5713965957a(28) =13425837103a(29) =29512490349
External references
- oeis: A302422