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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.

A022017 Number of connected partially ordered sets with n "lines": pairs (a,b) where a < b and there is no c with a < c < b. The lines form the minimal basis for the partial ordering.

Table of values

n a(n)
1 1
2 3
3 8
4 29
5 103
6 442
7 1953
8 9502
9 48533
10 262634
11 1485764
12 8777397
13 53869119

List of values

[1, 3, 8, 29, 103, 442, 1953, 9502, 48533, 262634, 1485764, 8777397, 53869119]

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

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