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.

A084077 Length of list created by n substitutions k -> Range(-abs(k+1), abs(k-1)) starting with {1}.

Table of values

n a(n)
0 1
1 3
2 11
3 41
4 159
5 633
6 2575
7 10657
8 44735
9 190017
10 815231
11 3527681
12 15378687
13 67478401
14 297777407
15 1320753665
16 5884652543
17 26326301697
18 118211192831
19 532574203905
20 2406726828031
21 10906541371393

List of values

[1, 3, 11, 41, 159, 633, 2575, 10657, 44735, 190017, 815231, 3527681, 15378687, 67478401, 297777407, 1320753665, 5884652543, 26326301697, 118211192831, 532574203905, 2406726828031, 10906541371393]

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

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