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.

A203298 Second elementary symmetric function of the first n terms of (1,2,2,3,3,4,4,5,5...).

Table of values

n a(n)
2 2
3 8
4 23
5 47
6 91
7 151
8 246
9 366
10 540
11 750
12 1037
13 1373
14 1813
15 2317
16 2956
17 3676
18 4566
19 5556
20 6755
21 8075
22 9647
23 11363
24 13378
25 15562
26 18096
27 20826
28 23961
29 27321
30 31145
31 35225
32 39832
33 44728
34 50218
35 56032
36 62511
37 69351
38 76931
39 84911
40 93710
41 102950

List of values

[2, 8, 23, 47, 91, 151, 246, 366, 540, 750, 1037, 1373, 1813, 2317, 2956, 3676, 4566, 5556, 6755, 8075, 9647, 11363, 13378, 15562, 18096, 20826, 23961, 27321, 31145, 35225, 39832, 44728, 50218, 56032, 62511, 69351, 76931, 84911, 93710, 102950]

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

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