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), (1, -1, 0), (1, 1, -1), (1, 1, 1)}.
A149801
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), (1, -1, 0), (1, 1, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =19a(4) =89a(5) =375a(6) =1803a(7) =8099a(8) =39461a(9) =183163a(10) =899665a(11) =4260553a(12) =21031851a(13) =100905983a(14) =499745741a(15) =2419272721a(16) =12008569813a(17) =58509307135a(18) =290886878755
External references
- oeis: A149801