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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.

A105804 a(n)=F(n-1)a(n-1)+F(n)a(n-2), where F = A000045 (Fibonacci numbers), a(0)=0, a(1)=1.

Table of values

n a(n)
0 0
1 1
2 1
3 3
4 9
5 42
6 282
7 2802
8 42348
9 984576
10 35804724
11 2056887084
12 188218830732
13 27582766315980
14 6497743050809304
15 2466474617607855408
16 1510962789131940581928
17 1495259232837545099449512
18 2391833322688676458284572616
19 6186748984680033744268134049416

List of values

[0, 1, 1, 3, 9, 42, 282, 2802, 42348, 984576, 35804724, 2056887084, 188218830732, 27582766315980, 6497743050809304, 2466474617607855408, 1510962789131940581928, 1495259232837545099449512, 2391833322688676458284572616, 6186748984680033744268134049416]

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

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