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, 0), (1, 0, 1)}.
A150458
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, 0), (1, 0, 1)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =25a(4) =96a(5) =396a(6) =1663a(7) =7216a(8) =31878a(9) =142690a(10) =647948a(11) =2965959a(12) =13697703a(13) =63689016a(14) =297749767a(15) =1399436219a(16) =6604167136a(17) =31286749357a(18) =148712785585a(19) =708904645509
External references
- oeis: A150458