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), (-1, 0, 1), (1, -1, -1), (1, 1, 0)}.
A149108
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), (-1, 0, 1), (1, -1, -1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =8a(4) =35a(5) =98a(6) =431a(7) =1361a(8) =6203a(9) =21117a(10) =97367a(11) =349863a(12) =1628534a(13) =6075216a(14) =28476830a(15) =109268287a(16) =514736603a(17) =2019723490a(18) =9551131625a(19) =38146488279a(20) =180943166799a(21) =733323214843
External references
- oeis: A149108