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, 0)}.
A151179
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, 0)}.
Terms
- a(0) =1a(1) =3a(2) =12a(3) =50a(4) =223a(5) =1015a(6) =4729a(7) =22313a(8) =106417a(9) =511458a(10) =2473148a(11) =12017294a(12) =58620251a(13) =286873813a(14) =1407618180a(15) =6922313041a(16) =34106536761a(17) =168315924156a(18) =831793119344
External references
- oeis: A151179