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, 0, 1), (0, 1, -1), (1, 0, 1), (1, 1, 0)}.
A150570
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, 0, 1), (0, 1, -1), (1, 0, 1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =26a(4) =108a(5) =453a(6) =1967a(7) =8706a(8) =39090a(9) =177790a(10) =816687a(11) =3781530a(12) =17611689a(13) =82495489a(14) =388239450a(15) =1834554841a(16) =8700456703a(17) =41396000957a(18) =197502228696a(19) =944598518988
External references
- oeis: A150570