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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.

A373632 Number of (binary) heaps where n is the sum of their length and the size of the element set [k].

Table of values

n a(n)
0 1
1 0
2 1
3 1
4 2
5 4
6 8
7 17
8 41
9 103
10 282
11 792
12 2239
13 6680
14 21143
15 70647
16 245357
17 871255
18 3202552
19 12334046
20 49635128
21 205403510
22 856780528
23 3601169551
24 15507530896
25 69267381313
26 320345619798
27 1518428936730
28 7345400773513
29 36469929240960
30 186875135258481

List of values

[1, 0, 1, 1, 2, 4, 8, 17, 41, 103, 282, 792, 2239, 6680, 21143, 70647, 245357, 871255, 3202552, 12334046, 49635128, 205403510, 856780528, 3601169551, 15507530896, 69267381313, 320345619798, 1518428936730, 7345400773513, 36469929240960, 186875135258481]

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

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