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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.

A321002 a(0)=3; thereafter a(n) = 20*6^(n-1)-2^(n-1).

Table of values

n a(n)
0 3
1 19
2 118
3 716
4 4312
5 25904
6 155488
7 933056
8 5598592
9 33592064
10 201553408
11 1209322496
12 7255939072
13 43535642624
14 261213872128
15 1567283265536
16 9403699658752
17 56422198083584
18 338533188763648
19 2031199133106176
20 12187194799685632
21 73123168800210944
22 438739012805459968
23 2632434076841148416

List of values

[3, 19, 118, 716, 4312, 25904, 155488, 933056, 5598592, 33592064, 201553408, 1209322496, 7255939072, 43535642624, 261213872128, 1567283265536, 9403699658752, 56422198083584, 338533188763648, 2031199133106176, 12187194799685632, 73123168800210944, 438739012805459968, 2632434076841148416]

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

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