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, 0, -1), (0, 1, 1), (1, 0, 0)}.
A150195
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, 0, -1), (0, 1, 1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =21a(4) =79a(5) =304a(6) =1223a(7) =5028a(8) =21047a(9) =89251a(10) =383518a(11) =1663928a(12) =7276480a(13) =32045842a(14) =142037287a(15) =632872830a(16) =2832858397a(17) =12734620947a(18) =57464148718a(19) =260162526888
External references
- oeis: A150195