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), (1, -1, 0), (1, 0, -1), (1, 0, 1)}.
A149392
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), (1, -1, 0), (1, 0, -1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =12a(4) =50a(5) =182a(6) =802a(7) =3224a(8) =14671a(9) =62224a(10) =288681a(11) =1268678a(12) =5963944a(13) =26845582a(14) =127400247a(15) =583601155a(16) =2789319664a(17) =12945796452a(18) =62215947017a(19) =291709886727
External references
- oeis: A149392