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), (0, 0, -1), (0, 0, 1), (1, 0, 1)}.
A150301
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), (0, 0, -1), (0, 0, 1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =21a(4) =80a(5) =281a(6) =1132a(7) =4357a(8) =18055a(9) =73253a(10) =309022a(11) =1297469a(12) =5558459a(13) =23884194a(14) =103688068a(15) =452547704a(16) =1986992167a(17) =8770142760a(18) =38880409859a(19) =173106495312a(20) =773616763147
External references
- oeis: A150301