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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.

A386230 G.f. A(x) satisfies A(x) = 1/( (1-x)^3 * (1 - x*A(x) - x^2*A'(x)) ).

Table of values

n a(n)
0 1
1 4
2 18
3 114
4 945
5 9399
6 106645
7 1342028
8 18409725
9 272154510
10 4300884555
11 72225827628
12 1283066570500
13 24025524690426
14 472822444534395
15 9755834028122904
16 210600429263424372
17 4747647482075588598
18 111583282733838959542
19 2729989048854423409090
20 69430953497076613542366

List of values

[1, 4, 18, 114, 945, 9399, 106645, 1342028, 18409725, 272154510, 4300884555, 72225827628, 1283066570500, 24025524690426, 472822444534395, 9755834028122904, 210600429263424372, 4747647482075588598, 111583282733838959542, 2729989048854423409090, 69430953497076613542366]

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

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