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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.

A342167 a(n) = U(n, (n+2)/2) where U(n, x) is a Chebyshev polynomial of the 2nd kind.

Table of values

n a(n)
0 1
1 3
2 15
3 115
4 1189
5 15456
6 242047
7 4435929
8 93149001
9 2205405829
10 58130412911
11 1688353631328
12 53577891882061
13 1844491975179855
14 68470281953483775
15 2726406212682669391
16 115921586524134874897
17 5241862216131004082160
18 251197634537351883217999

List of values

[1, 3, 15, 115, 1189, 15456, 242047, 4435929, 93149001, 2205405829, 58130412911, 1688353631328, 53577891882061, 1844491975179855, 68470281953483775, 2726406212682669391, 115921586524134874897, 5241862216131004082160, 251197634537351883217999]

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

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