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, 0), (1, -1, 1), (1, 0, -1), (1, 1, 1)}.
A149698
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, 0), (1, -1, 1), (1, 0, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =17a(4) =69a(5) =267a(6) =1167a(7) =4855a(8) =21419a(9) =92169a(10) =413653a(11) =1820575a(12) =8237365a(13) =36789927a(14) =167756317a(15) =757342581a(16) =3471510325a(17) =15797575547a(18) =72748645289a(19) =333122881165
External references
- oeis: A149698