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), (0, -1, 1), (0, 1, 0), (1, 1, -1), (1, 1, 0)}.
A150581
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), (0, -1, 1), (0, 1, 0), (1, 1, -1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =26a(4) =109a(5) =475a(6) =2137a(7) =9836a(8) =45988a(9) =217542a(10) =1038913a(11) =4996404a(12) =24168753a(13) =117457996a(14) =572995503a(15) =2804149754a(16) =13759367604a(17) =67664745185a(18) =333390341670
External references
- oeis: A150581