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, -1, 1), (0, 1, -1), (1, 0, 0), (1, 1, 0)}.
A149884
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, -1, 1), (0, 1, -1), (1, 0, 0), (1, 1, 0)}.
Terms
- a(0) =1a(1) =2a(2) =5a(3) =14a(4) =44a(5) =151a(6) =530a(7) =1956a(8) =7333a(9) =28175a(10) =110374a(11) =438557a(12) =1766533a(13) =7185329a(14) =29576438a(15) =122613969a(16) =512239312a(17) =2156329253a(18) =9129063620a(19) =38862836164a(20) =166293448143a(21) =715081979684
External references
- oeis: A149884