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, 0), (0, 0, 1), (0, 1, -1), (1, 0, -1)}.
A148564
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, 0), (0, 0, 1), (0, 1, -1), (1, 0, -1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =6a(4) =18a(5) =51a(6) =163a(7) =518a(8) =1775a(9) =6068a(10) =21667a(11) =78049a(12) =287879a(13) =1072984a(14) =4067632a(15) =15562411a(16) =60241545a(17) =235257990a(18) =927095075a(19) =3679753471a(20) =14713916547a(21) =59211993181a(22) =239712746135a(23) =975722553910
External references
- oeis: A148564