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, 0, 0), (-1, 1, 1), (0, -1, 1), (0, 1, -1), (1, 1, 1)}.
A149770
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, 0, 0), (-1, 1, 1), (0, -1, 1), (0, 1, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =19a(4) =75a(5) =315a(6) =1343a(7) =5805a(8) =25469a(9) =112617a(10) =501885a(11) =2250049a(12) =10139301a(13) =45886365a(14) =208442445a(15) =949943279a(16) =4341663243a(17) =19894045759a(18) =91366143203a(19) =420480670439
External references
- oeis: A149770