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, 1), (-1, 1, -1), (1, -1, 0), (1, 0, 1), (1, 1, 0)}.
A150427
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, 1), (-1, 1, -1), (1, -1, 0), (1, 0, 1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =24a(4) =97a(5) =390a(6) =1692a(7) =7257a(8) =32715a(9) =145621a(10) =671515a(11) =3062152a(12) =14336455a(13) =66470677a(14) =314556834a(15) =1476188273a(16) =7041681825a(17) =33348488337a(18) =160056033517a(19) =763398211532
External references
- oeis: A150427