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, 0, 1), (0, 1, -1), (0, 1, 1), (1, -1, 0)}.
A150475
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, 0, 1), (0, 1, -1), (0, 1, 1), (1, -1, 0)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =25a(4) =99a(5) =407a(6) =1736a(7) =7584a(8) =33771a(9) =152633a(10) =697966a(11) =3222902a(12) =15000588a(13) =70287630a(14) =331218105a(15) =1568416959a(16) =7458237045a(17) =35596100785a(18) =170438383971a(19) =818403513883
External references
- oeis: A150475