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, 0, 1), (0, -1, 1), (0, 1, -1), (0, 1, 1), (1, 1, 1)}.
A150991
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, 0, 1), (0, -1, 1), (0, 1, -1), (0, 1, 1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =9a(3) =37a(4) =169a(5) =764a(6) =3570a(7) =16703a(8) =79241a(9) =376798a(10) =1805142a(11) =8665465a(12) =41789096a(13) =201875936a(14) =978179193a(15) =4746784129a(16) =23083338726a(17) =112396493348a(18) =548133058539
External references
- oeis: A150991