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.

A348140 a(n) is the numerator of tan(n * arctan(1/n)).

Table of values

n a(n)
1 1
2 4
3 13
4 240
5 719
6 42372
7 92567
8 14970816
9 21475201
10 8825080100
11 7836127861
12 7809130867824
13 4132643140079
14 9678967816041188
15 2973238691433583
16 16000787866533953280
17 2798084251807349761
18 34017524842099233036996
19 3336132453587291393821
20 90417110945911655996319600

List of values

[1, 4, 13, 240, 719, 42372, 92567, 14970816, 21475201, 8825080100, 7836127861, 7809130867824, 4132643140079, 9678967816041188, 2973238691433583, 16000787866533953280, 2798084251807349761, 34017524842099233036996, 3336132453587291393821, 90417110945911655996319600]

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

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