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, 1), (-1, 1, 1), (0, 0, 1), (1, -1, 1), (1, 1, -1)}.
A148497
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, 1), (-1, 1, 1), (0, 0, 1), (1, -1, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =6a(4) =22a(5) =85a(6) =355a(7) =1492a(8) =6556a(9) =29052a(10) =132014a(11) =603615a(12) =2800177a(13) =13051694a(14) =61391948a(15) =289880238a(16) =1377164008a(17) =6563043266a(18) =31411893330a(19) =150726168692a(20) =725525043255
External references
- oeis: A148497