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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.

A014916 a(1)=1, a(n) = n*4^(n-1) + a(n-1).

Table of values

n a(n)
1 1
2 9
3 57
4 313
5 1593
6 7737
7 36409
8 167481
9 757305
10 3378745
11 14913081
12 65244729
13 283348537
14 1222872633
15 5249404473
16 22429273657
17 95443717689
18 404681363001
19 1710351420985
20 7207909559865
21 30297653743161
22 127054676987449
23 531674956009017
24 2220524816272953
25 9257399234039353

List of values

[1, 9, 57, 313, 1593, 7737, 36409, 167481, 757305, 3378745, 14913081, 65244729, 283348537, 1222872633, 5249404473, 22429273657, 95443717689, 404681363001, 1710351420985, 7207909559865, 30297653743161, 127054676987449, 531674956009017, 2220524816272953, 9257399234039353]

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

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