Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, -1), (-1, -1, 1), (-1, 1, 0), (0, 0, 1), (1, 0, 0)}.
A149856
Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, -1), (-1, -1, 1), (-1, 1, 0), (0, 0, 1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =2a(2) =5a(3) =13a(4) =37a(5) =119a(6) =397a(7) =1364a(8) =4718a(9) =16679a(10) =60629a(11) =223411a(12) =831697a(13) =3115490a(14) =11781657a(15) =45056702a(16) =173446087a(17) =671335261a(18) =2610604193a(19) =10205624491a(20) =40127858406a(21) =158396721706a(22) =627451787342
External references
- oeis: A149856