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, 1), (-1, 1, 0), (0, -1, 1), (0, 1, -1), (1, 1, 1)}.
A149769
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, 1), (-1, 1, 0), (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) =25465a(9) =112609a(10) =501809a(11) =2249753a(12) =10137825a(13) =45879657a(14) =208411749a(15) =949803899a(16) =4341030175a(17) =19891180107a(18) =91353150651a(19) =420421781995
External references
- oeis: A149769