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), (0, 1, -1), (0, 1, 0), (1, 0, 0)}.
A149976
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), (0, 1, -1), (0, 1, 0), (1, 0, 0)}.
Terms
- a(0) =1a(1) =2a(2) =5a(3) =16a(4) =56a(5) =205a(6) =789a(7) =3140a(8) =12737a(9) =52645a(10) =221237a(11) =940280a(12) =4036120a(13) =17488141a(14) =76333906a(15) =335288294a(16) =1481469377a(17) =6579191771a(18) =29346723435a(19) =131438569091a(20) =590855902974
External references
- oeis: A149976