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, 1, 1), (0, 0, 1), (0, 1, -1), (1, 0, 1)}.
A150411
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, 1, 1), (0, 0, 1), (0, 1, -1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =24a(4) =94a(5) =378a(6) =1575a(7) =6667a(8) =28738a(9) =125344a(10) =552033a(11) =2449988a(12) =10946580a(13) =49178724a(14) =221991504a(15) =1006153452a(16) =4576671364a(17) =20883615820a(18) =95560707553a(19) =438371820246
External references
- oeis: A150411