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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.

A128535 a(n) = F(n)*L(n-2) where F = Fibonacci and L = Lucas numbers.

Table of values

n a(n)
0 0
1 -1
2 2
3 2
4 9
5 20
6 56
7 143
8 378
9 986
10 2585
11 6764
12 17712
13 46367
14 121394
15 317810
16 832041
17 2178308
18 5702888
19 14930351
20 39088170
21 102334154
22 267914297
23 701408732
24 1836311904
25 4807526975
26 12586269026
27 32951280098
28 86267571273
29 225851433716
30 591286729880

List of values

[0, -1, 2, 2, 9, 20, 56, 143, 378, 986, 2585, 6764, 17712, 46367, 121394, 317810, 832041, 2178308, 5702888, 14930351, 39088170, 102334154, 267914297, 701408732, 1836311904, 4807526975, 12586269026, 32951280098, 86267571273, 225851433716, 591286729880]

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

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