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, 0), (0, 1, -1), (1, 0, -1), (1, 1, 1)}.
A149533
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, 0), (0, 1, -1), (1, 0, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =13a(4) =49a(5) =177a(6) =645a(7) =2521a(8) =9653a(9) =38409a(10) =152453a(11) =616017a(12) =2495933a(13) =10203805a(14) =41971201a(15) =173082373a(16) =719670741a(17) =2991784285a(18) =12531776661a(19) =52482689565a(20) =221024161045a(21) =931529633897
External references
- oeis: A149533