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.

A255942 Number of collections of nonempty multisets with a total of n objects of exactly two colors.

Table of values

n a(n)
2 2
3 8
4 23
5 56
6 127
7 268
8 547
9 1072
10 2055
11 3836
12 7045
13 12692
14 22566
15 39542
16 68520
17 117354
18 199082
19 334446
20 557175
21 920528
22 1509606
23 2457698
24 3974813
25 6387026
26 10201990
27 16201424
28 25589505
29 40205766
30 62857564
31 97800674
32 151475564
33 233575222
34 358656011
35 548476318

List of values

[2, 8, 23, 56, 127, 268, 547, 1072, 2055, 3836, 7045, 12692, 22566, 39542, 68520, 117354, 199082, 334446, 557175, 920528, 1509606, 2457698, 3974813, 6387026, 10201990, 16201424, 25589505, 40205766, 62857564, 97800674, 151475564, 233575222, 358656011, 548476318]

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

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