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, 1), (-1, 0, 1), (0, 0, -1), (1, 0, 0), (1, 1, 1)}.
A150808
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, 1), (-1, 0, 1), (0, 0, -1), (1, 0, 0), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =31a(4) =134a(5) =583a(6) =2626a(7) =11941a(8) =55132a(9) =256481a(10) =1203070a(11) =5674137a(12) =26901905a(13) =128059923a(14) =611818639a(15) =2931864809a(16) =14087637504a(17) =67849385837a(18) =327461830936
External references
- oeis: A150808