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, 1), (0, 1, 0), (0, 1, 1), (1, 0, 1), (1, 1, -1)}.
A151161
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, 1), (0, 1, 0), (0, 1, 1), (1, 0, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =3a(2) =11a(3) =47a(4) =213a(5) =985a(6) =4676a(7) =22425a(8) =108480a(9) =528613a(10) =2586817a(11) =12707610a(12) =62610096a(13) =309143709a(14) =1529340026a(15) =7576840370a(16) =37583562825a(17) =186620107114a(18) =927438209948
External references
- oeis: A151161