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), (1, -1, 1), (1, 0, -1), (1, 1, 0)}.
A149285
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), (1, -1, 1), (1, 0, -1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =11a(4) =44a(5) =158a(6) =658a(7) =2607a(8) =11193a(9) =46595a(10) =204255a(11) =875999a(12) =3896188a(13) =17047797a(14) =76627162a(15) =340148317a(16) =1541155940a(17) =6915715632a(18) =31530564726a(19) =142683439604a(20) =653825245219
External references
- oeis: A149285