cp's OEIS Frontend

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.

A287252 Number of set partitions of [n] such that all absolute differences between least elements of consecutive blocks are <= two.

Table of values

n a(n)
0 1
1 1
2 2
3 5
4 14
5 44
6 152
7 571
8 2317
9 10096
10 47013
11 232944
12 1223428
13 6786936
14 39640947
15 243060305
16 1560340480
17 10461611439
18 73094563140
19 531127372268
20 4006242743228
21 31316162403165
22 253292622192153
23 2116823651781702
24 18255325000268015
25 162261535224570326

List of values

[1, 1, 2, 5, 14, 44, 152, 571, 2317, 10096, 47013, 232944, 1223428, 6786936, 39640947, 243060305, 1560340480, 10461611439, 73094563140, 531127372268, 4006242743228, 31316162403165, 253292622192153, 2116823651781702, 18255325000268015, 162261535224570326]

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

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