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), (0, 0, 1), (1, -1, 1), (1, 1, -1), (1, 1, 0)}.
A150664
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), (0, 0, 1), (1, -1, 1), (1, 1, -1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =29a(4) =129a(5) =598a(6) =2835a(7) =13644a(8) =66319a(9) =324630a(10) =1597025a(11) =7885507a(12) =39041941a(13) =193699338a(14) =962518555a(15) =4788722705a(16) =23847568557a(17) =118848810902a(18) =592658978457
External references
- oeis: A150664