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), (-1, 1, 1), (0, 1, 1), (1, -1, -1)}.
A148263
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), (-1, 1, 1), (0, 1, 1), (1, -1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =4a(4) =14a(5) =33a(6) =111a(7) =323a(8) =1150a(9) =3550a(10) =13232a(11) =43213a(12) =163571a(13) =559092a(14) =2153259a(15) =7578945a(16) =29644401a(17) =106868221a(18) =422484263a(19) =1554283978a(20) =6199956152a(21) =23182015115a(22) =93218237485a(23) =353287504703
External references
- oeis: A148263