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), (0, 1, -1), (0, 1, 1), (1, 0, 0), (1, 1, -1)}.
A150225
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), (0, 1, -1), (0, 1, 1), (1, 0, 0), (1, 1, -1)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =21a(4) =84a(5) =348a(6) =1497a(7) =6588a(8) =29406a(9) =133422a(10) =611349a(11) =2827460a(12) =13181010a(13) =61823155a(14) =291598421a(15) =1381827519a(16) =6574502260a(17) =31392797767a(18) =150364898176a(19) =722203336247
External references
- oeis: A150225