A347847 a(n) is the number of (strict) chains of subspaces with ends 0 and (F_11)^n.
1, 13, 1863, 2939835, 51032042341, 9744480919457833, 20467619608367348894343, 472899301427912499856338638715, 120188439043897767650882899915804254541, 336007833514175643082885509533867247163277824513
Offset: 1
Keywords
Examples
a(3) = 1863 = 1 * 1 + 133 * 2 + 1596 * 1, counting: the unrefined chain 0 < (F_11)^3; 133 chains 0 < V < (F_11)^3, with dim(V) = 1; another 133 chains 0 < V < (F_11)^3, with dim(V) = 2; and 1596 chains 0 < V_1 < V_2 < (F_11)^3.
Links
- Álvar Ibeas, Table of n, a(n) for n = 1..40