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, 0), (-1, 0, 1), (0, 0, 1), (0, 1, -1), (1, -1, 0)}.
A148150
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, 0), (-1, 0, 1), (0, 0, 1), (0, 1, -1), (1, -1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =4a(4) =11a(5) =30a(6) =91a(7) =280a(8) =929a(9) =3125a(10) =10912a(11) =38716a(12) =141115a(13) =521666a(14) =1961738a(15) =7468828a(16) =28818382a(17) =112367258a(18) =442532489a(19) =1758198902a(20) =7044028427a(21) =28431378496a(22) =115539205449a(23) =472502030716
External references
- oeis: A148150