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, 0), (-1, 0, -1), (-1, 1, 1), (0, -1, -1), (1, 1, 1)}.
A149515
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, 0), (-1, 0, -1), (-1, 1, 1), (0, -1, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =11a(4) =49a(5) =157a(6) =629a(7) =2319a(8) =9165a(9) =35923a(10) =144111a(11) =579277a(12) =2349989a(13) =9611139a(14) =39510403a(15) =163374651a(16) =677811085a(17) =2823210939a(18) =11813207247a(19) =49554650923a(20) =208578981839a(21) =879510914225
External references
- oeis: A149515