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, 0), (-1, 0, 0), (0, 0, -1), (0, 1, 0), (1, 1, 1)}.
A150591
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, 0), (-1, 0, 0), (0, 0, -1), (0, 1, 0), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =27a(4) =105a(5) =426a(6) =1787a(7) =7590a(8) =32633a(9) =142152a(10) =624659a(11) =2763357a(12) =12305393a(13) =55103828a(14) =247872791a(15) =1119588403a(16) =5075796897a(17) =23086174696a(18) =105306348827a(19) =481622980387
External references
- oeis: A150591