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, 0, 1), (0, 1, 0), (1, -1, 1), (1, 0, 1), (1, 1, -1)}.
A150660
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, 0, 1), (0, 1, 0), (1, -1, 1), (1, 0, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =28a(4) =122a(5) =553a(6) =2571a(7) =12160a(8) =58208a(9) =281102a(10) =1366505a(11) =6676481a(12) =32747954a(13) =161124710a(14) =794716382a(15) =3927618936a(16) =19442645394a(17) =96375419793a(18) =478259944819
External references
- oeis: A150660