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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.

A309204 Numerators of coefficients of odd powers of x in expansion of f(x) = x cos (x cos (x cos( ... .

Table of values

n a(n)
1 1
2 -1
3 13
4 -541
5 9509
6 -7231801
7 1695106117
8 -567547087381
9 36760132319047
10 -151856004814953841
11 113144789723082206461
12 -103890621918675777804301
13 8866964955352146292017421
14 -8002609021370033485261033939
15 47038068678960604511245887564401
16 -421635069078222570953208470234640901

List of values

[1, -1, 13, -541, 9509, -7231801, 1695106117, -567547087381, 36760132319047, -151856004814953841, 113144789723082206461, -103890621918675777804301, 8866964955352146292017421, -8002609021370033485261033939, 47038068678960604511245887564401, -421635069078222570953208470234640901]

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

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