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), (0, 0, 1), (0, 1, -1), (1, 0, -1), (1, 1, 1)}.
A150932
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), (0, 0, 1), (0, 1, -1), (1, 0, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =9a(3) =33a(4) =153a(5) =644a(6) =3079a(7) =13796a(8) =66951a(9) =309900a(10) =1516751a(11) =7163139a(12) =35252495a(13) =168702164a(14) =833311863a(15) =4024832013a(16) =19933067217a(17) =96923446796a(18) =480935723503
External references
- oeis: A150932