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.

A269455 Number of Type I (singly-even) self-dual binary codes of length 2n.

Table of values

n a(n)
1 1
2 3
3 15
4 105
5 2295
6 75735
7 4922775
8 625192425
9 163204759575
10 83724041661975
11 85817142703524375
12 175667691114114395625
13 720413716161839357604375
14 5902349576513949856852644375
15 96709997811181068404530578084375
16 3168896498278970068411253452090715625
17 207692645973961964120828372930661061284375
18 27222898185745116523209337325140537285726884375
19 7136346644902153570976711733098966146766874104484375
20 3741493773415815389266667264411257664189964123617799515625

List of values

[1, 3, 15, 105, 2295, 75735, 4922775, 625192425, 163204759575, 83724041661975, 85817142703524375, 175667691114114395625, 720413716161839357604375, 5902349576513949856852644375, 96709997811181068404530578084375, 3168896498278970068411253452090715625, 207692645973961964120828372930661061284375, 27222898185745116523209337325140537285726884375, 7136346644902153570976711733098966146766874104484375, 3741493773415815389266667264411257664189964123617799515625]

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

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