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, 0, 1), (0, -1, 1), (0, 1, 0), (1, 0, 0)}.
A150047
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, 0, 1), (0, -1, 1), (0, 1, 0), (1, 0, 0)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =18a(4) =60a(5) =216a(6) =802a(7) =3114a(8) =12106a(9) =48228a(10) =194844a(11) =798210a(12) =3311822a(13) =13798214a(14) =58000532a(15) =245438412a(16) =1045431698a(17) =4480601066a(18) =19260873880a(19) =83181717798a(20) =360642829048
External references
- oeis: A150047