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, -1), (-1, 0, 1), (1, 0, 0), (1, 1, 1)}.
A150697
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, -1), (-1, 0, 1), (1, 0, 0), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =26a(4) =120a(5) =445a(6) =2106a(7) =8302a(8) =40075a(9) =163934a(10) =797561a(11) =3341834a(12) =16370003a(13) =69800886a(14) =343163275a(15) =1482329691a(16) =7311311272a(17) =31907997150a(18) =157698550081a(19) =693887774764
External references
- oeis: A150697