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), (0, 0, -1), (0, 1, -1), (1, 0, 1), (1, 1, 1)}.
A150937
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), (0, 0, -1), (0, 1, -1), (1, 0, 1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =9a(3) =34a(4) =149a(5) =655a(6) =2973a(7) =13542a(8) =63195a(9) =295239a(10) =1391221a(11) =6607775a(12) =31486131a(13) =150555115a(14) =723726889a(15) =3484954560a(16) =16822569925a(17) =81467300557a(18) =395050078051
External references
- oeis: A150937