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.

A203242 Second elementary symmetric function of the first n terms of (1, 3, 7, 15, 31, ...).

Table of values

n a(n)
2 3
3 31
4 196
5 1002
6 4593
7 19833
8 82818
9 339340
10 1375639
11 5543331
12 22263216
13 89249214
14 357422541
15 1430607325
16 5724394990
17 22901773824
18 91616007699
19 366482904615
20 1465971463740
21 5863969740370
22 23456055121513
23 93824589584001

List of values

[3, 31, 196, 1002, 4593, 19833, 82818, 339340, 1375639, 5543331, 22263216, 89249214, 357422541, 1430607325, 5724394990, 22901773824, 91616007699, 366482904615, 1465971463740, 5863969740370, 23456055121513, 93824589584001]

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

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