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, 0), (0, 1, 1), (1, 0, -1), (1, 1, 0)}.
A150544
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, 0), (0, 1, 1), (1, 0, -1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =26a(4) =103a(5) =432a(6) =1858a(7) =8189a(8) =36707a(9) =166756a(10) =765805a(11) =3547921a(12) =16557837a(13) =77750578a(14) =367020564a(15) =1740351525a(16) =8285019143a(17) =39577214547a(18) =189634224541a(19) =911087840169
External references
- oeis: A150544