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.

A261399 a(1)=1; thereafter a(n) = (2/5)*(9*6^(n-2)+1).

Table of values

n a(n)
1 1
2 4
3 22
4 130
5 778
6 4666
7 27994
8 167962
9 1007770
10 6046618
11 36279706
12 217678234
13 1306069402
14 7836416410
15 47018498458
16 282110990746
17 1692665944474
18 10155995666842
19 60935974001050
20 365615844006298
21 2193695064037786
22 13162170384226714
23 78973022305360282
24 473838133832161690

List of values

[1, 4, 22, 130, 778, 4666, 27994, 167962, 1007770, 6046618, 36279706, 217678234, 1306069402, 7836416410, 47018498458, 282110990746, 1692665944474, 10155995666842, 60935974001050, 365615844006298, 2193695064037786, 13162170384226714, 78973022305360282, 473838133832161690]