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, 0), (0, -1, 1), (1, -1, -1), (1, 1, 0)}.
A149136
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, 0), (0, -1, 1), (1, -1, -1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =9a(4) =34a(5) =114a(6) =412a(7) =1525a(8) =5750a(9) =22180a(10) =87212a(11) =344932a(12) =1378350a(13) =5559474a(14) =22587780a(15) =92430941a(16) =380169394a(17) =1570761624a(18) =6519130912a(19) =27166630828a(20) =113611754346a(21) =476626237184
External references
- oeis: A149136