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, 1), (-1, 1, -1), (0, 1, -1), (1, 0, 1)}.
A149188
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, 1), (-1, 1, -1), (0, 1, -1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =10a(4) =37a(5) =126a(6) =470a(7) =1757a(8) =6821a(9) =26562a(10) =105818a(11) =423428a(12) =1716182a(13) =6992321a(14) =28716249a(15) =118480304a(16) =491549494a(17) =2047242541a(18) =8561397677a(19) =35918756167a(20) =151171279767a(21) =637943008302
External references
- oeis: A149188