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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.

A027835 Number of unlabeled strongly connected n-state 2-input automata.

Table of values

n a(n)
1 1
2 6
3 52
4 892
5 21291
6 658885
7 24617866
8 1077142765
9 53918557215
10 3036369842197
11 189881640057942
12 13051044976503663
13 977672716919010876
14 79267586388173032966
15 6914956215333832011058
16 645771787789692953182732
17 64277686448923785217048191
18 6793045601578652098886514581
19 759656437858515775195264228768
20 89619947709601175930862298926038

List of values

[1, 6, 52, 892, 21291, 658885, 24617866, 1077142765, 53918557215, 3036369842197, 189881640057942, 13051044976503663, 977672716919010876, 79267586388173032966, 6914956215333832011058, 645771787789692953182732, 64277686448923785217048191, 6793045601578652098886514581, 759656437858515775195264228768, 89619947709601175930862298926038]

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

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