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, 1, -1), (0, 1, 1), (1, 0, -1)}.
A148370
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, 1, -1), (0, 1, 1), (1, 0, -1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =5a(4) =16a(5) =42a(6) =147a(7) =454a(8) =1628a(9) =5425a(10) =20178a(11) =70153a(12) =268235a(13) =963094a(14) =3750168a(15) =13820410a(16) =54545612a(17) =205188861a(18) =818752204a(19) =3130596415a(20) =12607433542a(21) =48850200688a(22) =198265158766a(23) =776800033465
External references
- oeis: A148370