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), (0, 0, -1), (1, 1, -1), (1, 1, 1)}.
A149737
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), (0, 0, -1), (1, 1, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =17a(4) =77a(5) =297a(6) =1373a(7) =5809a(8) =27253a(9) =120329a(10) =570573a(11) =2586625a(12) =12364485a(13) =57069913a(14) =274465917a(15) =1283251825a(16) =6200548277a(17) =29271883273a(18) =141965261869a(19) =675241861857
External references
- oeis: A149737