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), (-1, 1, 1), (1, 0, 1), (1, 1, -1), (1, 1, 0)}.
A150826
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), (-1, 1, 1), (1, 0, 1), (1, 1, -1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =31a(4) =144a(5) =628a(6) =3040a(7) =13980a(8) =68716a(9) =324720a(10) =1607746a(11) =7718620a(12) =38364784a(13) =186045893a(14) =926767620a(15) =4524889398a(16) =22569907648a(17) =110727110550a(18) =552750968483
External references
- oeis: A150826