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.

A302453 a(n) = coefficient of x^(2*n-1) in the n-th iteration (n-fold self-composition) of e.g.f. tan(x).

Table of values

n a(n)
1 1
2 4
3 168
4 26400
5 10373760
6 8226518272
7 11524607732736
8 26047611675267072
9 88935060882222120960
10 436394080487109570265088
11 2959343413232671759344861184
12 26874522377891724867898947141632
13 318464577992023576681854032513335296
14 4818779071094868918454887699722367139840

List of values

[1, 4, 168, 26400, 10373760, 8226518272, 11524607732736, 26047611675267072, 88935060882222120960, 436394080487109570265088, 2959343413232671759344861184, 26874522377891724867898947141632, 318464577992023576681854032513335296, 4818779071094868918454887699722367139840]

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

Content is available under The OEIS End-User License Agreement.