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, 0), (-1, -1, 1), (-1, 1, -1), (1, -1, 1), (1, 1, 0)}.
A149110
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, 0), (-1, -1, 1), (-1, 1, -1), (1, -1, 1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =8a(4) =36a(5) =94a(6) =440a(7) =1322a(8) =6317a(9) =20657a(10) =99936a(11) =345735a(12) =1686163a(13) =6072752a(14) =29782403a(15) =110551868a(16) =544355540a(17) =2068820911a(18) =10217295294a(19) =39572173158a(20) =195880849556a(21) =770527923681
External references
- oeis: A149110