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, 0, 1), (1, 0, 1), (1, 1, 0), (1, 1, 1)}.
A151218
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, 0, 1), (1, 0, 1), (1, 1, 0), (1, 1, 1)}.
Terms
- a(0) =1a(1) =3a(2) =13a(3) =55a(4) =263a(5) =1196a(6) =5850a(7) =27528a(8) =135726a(9) =650470a(10) =3222016a(11) =15609182a(12) =77539788a(13) =378324161a(14) =1882662003a(15) =9231694688a(16) =45993117480a(17) =226350480727
External references
- oeis: A151218