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.

A330764 Number of series-reduced rooted trees whose leaves are sets with a total of n elements covering an initial interval of positive integers.

Table of values

n a(n)
1 1
2 3
3 18
4 194
5 2944
6 57959
7 1398858
8 39981994
9 1320143478
10 49439258516
11 2070409961552
12 95867076538834
13 4863079990663528
14 268198764863998103
15 15977057268090388836
16 1022415045656417706598
17 69946606996018140613292
18 5094427098628436561252367
19 393558075509405403487404506

List of values

[1, 3, 18, 194, 2944, 57959, 1398858, 39981994, 1320143478, 49439258516, 2070409961552, 95867076538834, 4863079990663528, 268198764863998103, 15977057268090388836, 1022415045656417706598, 69946606996018140613292, 5094427098628436561252367, 393558075509405403487404506]

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

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