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, 0), (-1, 0, 1), (0, 1, -1), (1, -1, 1), (1, 0, 1)}.
A148945
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, 0), (-1, 0, 1), (0, 1, -1), (1, -1, 1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =9a(4) =29a(5) =104a(6) =390a(7) =1482a(8) =5872a(9) =23670a(10) =96862a(11) =402409a(12) =1691824a(13) =7184785a(14) =30771333a(15) =132773241a(16) =577026236a(17) =2521811081a(18) =11077691844a(19) =48908119250a(20) =216832245702a(21) =964920349669
External references
- oeis: A148945