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), (0, 0, -1), (0, 1, -1), (0, 1, 0), (1, 0, 1)}.
A150216
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), (0, 0, -1), (0, 1, -1), (0, 1, 0), (1, 0, 1)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =21a(4) =82a(5) =315a(6) =1270a(7) =5286a(8) =22312a(9) =94860a(10) =409872a(11) =1789776a(12) =7860018a(13) =34740429a(14) =154655188a(15) =691888680a(16) =3107165282a(17) =14012949053a(18) =63443464419a(19) =288098351357
External references
- oeis: A150216