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, 0, 1), (1, -1, 1), (1, 0, -1), (1, 1, -1)}.
A148866
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, 0, 1), (1, -1, 1), (1, 0, -1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =8a(4) =28a(5) =98a(6) =374a(7) =1450a(8) =5853a(9) =24018a(10) =100685a(11) =427876a(12) =1843316a(13) =8023328a(14) =35263612a(15) =156234952a(16) =697236891a(17) =3131311800a(18) =14143354394a(19) =64206790059a(20) =292826696557
External references
- oeis: A148866