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), (-1, 1, 1), (0, -1, 1), (1, 1, -1), (1, 1, 0)}.
A149460
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), (-1, 1, 1), (0, -1, 1), (1, 1, -1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =13a(4) =50a(5) =205a(6) =866a(7) =3749a(8) =16632a(9) =75039a(10) =341961a(11) =1576018a(12) =7327168a(13) =34283739a(14) =161361590a(15) =763453145a(16) =3627427677a(17) =17298560102a(18) =82772495282a(19) =397211322958
External references
- oeis: A149460