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, 0, 1), (0, 0, -1), (0, 1, -1), (1, 0, 1)}.
A149366
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, 0, 1), (0, 0, -1), (0, 1, -1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =12a(4) =45a(5) =147a(6) =630a(7) =2379a(8) =10058a(9) =39493a(10) =174771a(11) =722360a(12) =3188845a(13) =13422230a(14) =60590448a(15) =261827778a(16) =1181161187a(17) =5155905071a(18) =23569271399a(19) =104520154563a(20) =477730909858
External references
- oeis: A149366