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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.

A099157 a(n) = 4^(n-1)*U(n-1, 3/2) where U is the Chebyshev polynomial of the second kind.

Table of values

n a(n)
0 0
1 1
2 12
3 128
4 1344
5 14080
6 147456
7 1544192
8 16171008
9 169345024
10 1773404160
11 18571329536
12 194481487872
13 2036636581888
14 21327935176704
15 223349036810240
16 2338941478895616
17 24493713157783552
18 256501494231072768

List of values

[0, 1, 12, 128, 1344, 14080, 147456, 1544192, 16171008, 169345024, 1773404160, 18571329536, 194481487872, 2036636581888, 21327935176704, 223349036810240, 2338941478895616, 24493713157783552, 256501494231072768]

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

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