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, 0, -1), (0, -1, 1), (1, -1, -1), (1, 1, 1)}.
A149512
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, 0, -1), (0, -1, 1), (1, -1, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =11a(4) =47a(5) =155a(6) =589a(7) =2243a(8) =8705a(9) =34179a(10) =137203a(11) =548507a(12) =2227953a(13) =9096849a(14) =37321153a(15) =154113155a(16) =639423165a(17) =2662177409a(18) =11135243199a(19) =46703001657a(20) =196404723001a(21) =828389701307
External references
- oeis: A149512