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, -1, 1), (1, 0, 0), (1, 1, -1)}.
A148622
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, -1, 1), (1, 0, 0), (1, 1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =6a(4) =21a(5) =59a(6) =224a(7) =778a(8) =3074a(9) =11996a(10) =49040a(11) =203505a(12) =860069a(13) =3696639a(14) =16073620a(15) =70742766a(16) =314411761a(17) =1409236688a(18) =6367263724a(19) =28958423806a(20) =132525828708a(21) =609812684776
External references
- oeis: A148622