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, 0), (0, 1, 1), (1, 0, -1), (1, 0, 0)}.
A150251
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, 0), (0, 1, 1), (1, 0, -1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =22a(4) =85a(5) =340a(6) =1411a(7) =6036a(8) =26163a(9) =114983a(10) =513060a(11) =2308456a(12) =10465788a(13) =47829991a(14) =219922058a(15) =1016135334a(16) =4717666738a(17) =21999886908a(18) =102949227180a(19) =483335249790
External references
- oeis: A150251