Total number of nodes in all walks on cubic lattice starting at (0,0,0), ending at (0,0,n), remaining in the first (nonnegative) octant and using steps which are permutations of (-2,1,2), (-1,0,2), (-1,1,1), (0,0,1).
A328268
Total number of nodes in all walks on cubic lattice starting at (0,0,0), ending at (0,0,n), remaining in the first (nonnegative) octant and using steps which are permutations of (-2,1,2), (-1,0,2), (-1,1,1), (0,0,1).
Terms
- a(0) =1a(1) =2a(2) =9a(3) =36a(4) =225a(5) =1458a(6) =11277a(7) =92520a(8) =829521a(9) =7827750a(10) =77868945a(11) =805275756a(12) =8628016761a(13) =95164931610
External references
- oeis: A328268