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, -1, 1), (1, 1, -1), (1, 1, 1)}.
A149745
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, -1, 1), (1, 1, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =17a(4) =79a(5) =321a(6) =1495a(7) =6571a(8) =31009a(9) =141345a(10) =674375a(11) =3141567a(12) =15106187a(13) =71367081a(14) =345115645a(15) =1646406573a(16) =7995517313a(17) =38414709245a(18) =187167554711a(19) =904086623973
External references
- oeis: A149745