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, 0, 1), (0, 1, 1), (1, 1, -1)}.
A150082
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, 0, 1), (0, 1, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =18a(4) =70a(5) =250a(6) =1006a(7) =3874a(8) =16342a(9) =65962a(10) =283822a(11) =1181922a(12) =5175590a(13) =22032458a(14) =97617614a(15) =422506482a(16) =1889729286a(17) =8284257418a(18) =37328051678a(19) =165318691730a(20) =749446644646
External references
- oeis: A150082