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, 0), (-1, 1, 0), (1, 0, -1), (1, 0, 0), (1, 1, 1)}.
A150781
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, 0), (-1, 1, 0), (1, 0, -1), (1, 0, 0), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =30a(4) =134a(5) =558a(6) =2598a(7) =11482a(8) =54330a(9) =247658a(10) =1185087a(11) =5507642a(12) =26549870a(13) =125054453a(14) =605935016a(15) =2881536153a(16) =14016692100a(17) =67135696027a(18) =327558404737
External references
- oeis: A150781