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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.

A105493 Number of partitions of {1,...,n} containing 3 strings of 3 consecutive integers such that only v-strings of consecutive integers can appear in a block, where v = 1,2,3.

Table of values

n a(n)
9 2
10 20
11 170
12 1340
13 10375
14 80652
15 636990
16 5143740
17 42613980
18 362863600
19 3178544754
20 28650249848

List of values

[2, 20, 170, 1340, 10375, 80652, 636990, 5143740, 42613980, 362863600, 3178544754, 28650249848]

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

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