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, -1, 0), (-1, 0, -1), (1, 0, 0), (1, 1, 1)}.
A150349
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, -1, 0), (-1, 0, -1), (1, 0, 0), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =23a(4) =91a(5) =338a(6) =1413a(7) =5574a(8) =23971a(9) =97986a(10) =429233a(11) =1797063a(12) =7972403a(13) =33958742a(14) =152071651a(15) =656286187a(16) =2960241961a(17) =12907599412a(18) =58557022405a(19) =257465167525
External references
- oeis: A150349