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, 1, -1), (0, 0, 1), (0, 1, 0), (1, -1, -1)}.
A149818
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, 1, -1), (0, 0, 1), (0, 1, 0), (1, -1, -1)}.
Terms
- a(0) =1a(1) =2a(2) =4a(3) =10a(4) =26a(5) =76a(6) =248a(7) =824a(8) =2766a(9) =9616a(10) =34586a(11) =126604a(12) =469054a(13) =1763768a(14) =6740582a(15) =26050180a(16) =101538790a(17) =399330656a(18) =1585705250a(19) =6344919988a(20) =25545244242a(21) =103470060008a(22) =421830613640
External references
- oeis: A149818