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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.

A378944 Triangle read by rows: T(n,k) = number of stamp foldings with stamp #1 first, n stamps and stamp #2 covered by exactly one fold. k = the stamp number before the fold covering stamp #2 divided by 2. See examples.

Table of values

n a(n)
5 2
6 4
7 8
8 6
9 20
10 12
11 48
12 24
13 28
14 132
15 60
16 56
17 348
18 144
19 112
20 162
21 1008
22 396
23 280
24 324
25 2812
26 1044
27 672
28 648
29 1076
30 8420
31 3024
32 1848
33 1620
34 2152

List of values

[2, 4, 8, 6, 20, 12, 48, 24, 28, 132, 60, 56, 348, 144, 112, 162, 1008, 396, 280, 324, 2812, 1044, 672, 648, 1076, 8420, 3024, 1848, 1620, 2152]

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

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