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), (0, -1, 0), (0, 0, -1), (0, 0, 1), (1, 1, 0)}.
A150471
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), (0, -1, 0), (0, 0, -1), (0, 0, 1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =25a(4) =99a(5) =402a(6) =1687a(7) =7242a(8) =31589a(9) =139772a(10) =625245a(11) =2822337a(12) =12844579a(13) =58831382a(14) =271083007a(15) =1255384097a(16) =5839684171a(17) =27274710988a(18) =127836802627a(19) =601121704001
External references
- oeis: A150471