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), (0, -1, 1), (0, 0, 1), (1, 1, -1)}.
A148376
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), (0, -1, 1), (0, 0, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =5a(4) =16a(5) =46a(6) =153a(7) =513a(8) =1852a(9) =6544a(10) =24235a(11) =91027a(12) =348827a(13) =1338838a(14) =5247023a(15) =20764179a(16) =82790176a(17) =332119886a(18) =1347341002a(19) =5497739594a(20) =22536585590a(21) =92940614967a(22) =385805282451
External references
- oeis: A148376