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, 0), (1, 0, 0), (1, 1, 1)}.
A151111
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, 0), (1, 0, 0), (1, 1, 1)}.
Terms
- a(0) =1a(1) =3a(2) =11a(3) =45a(4) =187a(5) =821a(6) =3655a(7) =16563a(8) =76299a(9) =353565a(10) =1656135a(11) =7795435a(12) =36891565a(13) =175420449a(14) =836797617a(15) =4006135089a(16) =19230908851a(17) =92540054469a(18) =446356079927
External references
- oeis: A151111