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, 1, -1), (1, -1, 0), (1, 0, 1), (1, 1, -1)}.
A148813
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, 1, -1), (1, -1, 0), (1, 0, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =8a(4) =26a(5) =86a(6) =314a(7) =1113a(8) =4239a(9) =16219a(10) =63071a(11) =248619a(12) =1006515a(13) =4029015a(14) =16543263a(15) =68254132a(16) =282375694a(17) =1178569272a(18) =4977684152a(19) =20904474572a(20) =88923131344a(21) =379777454862
External references
- oeis: A148813