A220445 Total number of cells in the stacky fan A_n^tr.
1, 4, 9, 61, 179433
Offset: 1
Links
- Melody T. Chan, Tropical curves and metric graphs, Ph. D. Dissertation, Univ. Calif. Berkeley, Spring 2012.
Crossrefs
Cf. A220444.
This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
The irregular triangle T(n,k) begins: n\k 0 1 2 3 4 5 6 7 8 9 10 11 12... 2: 1, 1, 1, 1; 3: 1, 1, 1, 2, 2, 1, 1; 4: 1, 1, 1, 2, 3, 4, 5, 4, 2, 2; 5: 1, 1, 1, 2, 3, 5, 9, 12, 15, 17, 15, 7, 4; ...
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