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, 0), (-1, 1, -1), (-1, 1, 0), (1, 0, -1), (1, 1, 1)}.
A149548
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, 0), (-1, 1, -1), (-1, 1, 0), (1, 0, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =13a(4) =55a(5) =183a(6) =819a(7) =2879a(8) =13213a(9) =49231a(10) =227123a(11) =876693a(12) =4073717a(13) =16120745a(14) =75276547a(15) =303636677a(16) =1423564969a(17) =5828509759a(18) =27410607645a(19) =113608901595a(20) =535627472609
External references
- oeis: A149548