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, 1, 1), (1, 0, 1), (1, 1, -1)}.
A150654
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, 1, 1), (1, 0, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =28a(4) =120a(5) =525a(6) =2387a(7) =10919a(8) =50974a(9) =238801a(10) =1131589a(11) =5377188a(12) =25727692a(13) =123387617a(14) =594364897a(15) =2868769619a(16) =13888104107a(17) =67345509405a(18) =327276382110
External references
- oeis: A150654