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, 0, 0), (0, -1, 0), (0, 1, 0), (1, 1, 0), (1, 1, 1)}.
A151237
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, 0, 0), (0, -1, 0), (0, 1, 0), (1, 1, 0), (1, 1, 1)}.
Terms
- a(0) =1a(1) =3a(2) =14a(3) =63a(4) =298a(5) =1428a(6) =6906a(7) =33653a(8) =164836a(9) =810060a(10) =3993446a(11) =19727978a(12) =97630392a(13) =483860652a(14) =2400763156a(15) =11923446689a(16) =59266186460a(17) =294785399216
External references
- oeis: A151237