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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.

A277395 a(n) = Sum_{k=0..n} binomial(n+1,k+1)*A001003(k).

Table of values

n a(n)
0 1
1 3
2 9
3 33
4 145
5 713
6 3745
7 20513
8 115713
9 667329
10 3916033
11 23305857
12 140327681
13 853262465
14 5231925761
15 32313686529
16 200843829249
17 1255308123137
18 7884792852481
19 49745076576257
20 315091155558401
21 2003009460686849
22 12774610185633793

List of values

[1, 3, 9, 33, 145, 713, 3745, 20513, 115713, 667329, 3916033, 23305857, 140327681, 853262465, 5231925761, 32313686529, 200843829249, 1255308123137, 7884792852481, 49745076576257, 315091155558401, 2003009460686849, 12774610185633793]

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

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