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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.

A277611 Expansion of 1 / (1 - Sum_{k>=1} k^(k-2) * x^k ).

Table of values

n a(n)
0 1
1 1
2 2
3 6
4 27
5 180
6 1678
7 20388
8 305331
9 5423511
10 111282445
11 2587931469
12 67239205808
13 1929910531883
14 60636166356164
15 2069775112992573
16 76268207153351225
17 3017346008698599752
18 127561003043924116908
19 5738904556162964523209
20 273764048456544759900846
21 13802374108958236134168506
22 733335098861491664742838394
23 40953333749038944871704984923
24 2398217239830108487402017089693
25 146949291558772355319517897103987

List of values

[1, 1, 2, 6, 27, 180, 1678, 20388, 305331, 5423511, 111282445, 2587931469, 67239205808, 1929910531883, 60636166356164, 2069775112992573, 76268207153351225, 3017346008698599752, 127561003043924116908, 5738904556162964523209, 273764048456544759900846, 13802374108958236134168506, 733335098861491664742838394, 40953333749038944871704984923, 2398217239830108487402017089693, 146949291558772355319517897103987]

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

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