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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.

A320211 Number of sets of nonempty words with a total of n letters over denary alphabet such that all letters occur at least once in the set.

Table of values

n a(n)
10 58941091
11 4097382940
12 159454061270
13 4587784661870
14 108909499300650
15 2259736176893470
16 42433681634931005
17 737876928284127870
18 12073172284265618005
19 188049325030487680920
20 2812707955072045999940
21 40672129029056125818340
22 571583937930987524954470

List of values

[58941091, 4097382940, 159454061270, 4587784661870, 108909499300650, 2259736176893470, 42433681634931005, 737876928284127870, 12073172284265618005, 188049325030487680920, 2812707955072045999940, 40672129029056125818340, 571583937930987524954470]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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