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, 0, 0), (0, 1, 0), (1, -1, -1), (1, 0, 1)}.
A150008
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, 0, 0), (0, 1, 0), (1, -1, -1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =2a(2) =5a(3) =17a(4) =60a(5) =226a(6) =878a(7) =3464a(8) =14021a(9) =57807a(10) =241666a(11) =1023174a(12) =4367445a(13) =18782294a(14) =81402927a(15) =355139477a(16) =1558645747a(17) =6875471321a(18) =30454291424a(19) =135423012261a(20) =604468388810
External references
- oeis: A150008