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.

A265937 G.f.: Sum_{n>=0} (1 + x)^(n*(n+1)/2) / 2^n.

Table of values

n a(n)
0 2
1 4
2 24
3 248
4 3600
5 67296
6 1538672
7 41593920
8 1297683360
9 45891815040
10 1814072216864
11 79263667304640
12 3793393788125760
13 197339219789611200
14 11087608251010390080
15 669127189486395204544
16 43167108189991530605184
17 2964541208087967215725440
18 215934869210274766223069440
19 16627513858173093851116296960
20 1349582577808759197056647917696
21 115158206188199564942934814336896
22 10305721256666828267464573643658240

List of values

[2, 4, 24, 248, 3600, 67296, 1538672, 41593920, 1297683360, 45891815040, 1814072216864, 79263667304640, 3793393788125760, 197339219789611200, 11087608251010390080, 669127189486395204544, 43167108189991530605184, 2964541208087967215725440, 215934869210274766223069440, 16627513858173093851116296960, 1349582577808759197056647917696, 115158206188199564942934814336896, 10305721256666828267464573643658240]

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

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