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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.

A345963 a(n) = (q^2-q+1)/3 where q = 2^(2*n+1) = A004171(n).

Table of values

n a(n)
0 1
1 19
2 331
3 5419
4 87211
5 1397419
6 22366891
7 357903019
8 5726579371
9 91625794219
10 1466014804651
11 23456245263019
12 375299957762731
13 6004799458421419
14 96076791871613611
15 1537228672093301419
16 24595658762082757291
17 393530540227683855019
18 6296488643780380633771
19 100743818301035845954219

List of values

[1, 19, 331, 5419, 87211, 1397419, 22366891, 357903019, 5726579371, 91625794219, 1466014804651, 23456245263019, 375299957762731, 6004799458421419, 96076791871613611, 1537228672093301419, 24595658762082757291, 393530540227683855019, 6296488643780380633771, 100743818301035845954219]

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

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