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), (1, 0, -1), (1, 1, 1)}.
A149564
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), (1, 0, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =13a(4) =59a(5) =197a(6) =915a(7) =3325a(8) =15733a(9) =60317a(10) =288181a(11) =1145295a(12) =5509487a(13) =22451225a(14) =108586043a(15) =450783555a(16) =2189360465a(17) =9221321187a(18) =44933067763a(19) =191465798107a(20) =935415358939
External references
- oeis: A149564