cp's OEIS Frontend

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.

A081018 a(n) = (Lucas(4n+1)-1)/5, or Fibonacci(2n)*Fibonacci(2n+1), or A081017(n)/5.

Table of values

n a(n)
0 0
1 2
2 15
3 104
4 714
5 4895
6 33552
7 229970
8 1576239
9 10803704
10 74049690
11 507544127
12 3478759200
13 23843770274
14 163427632719
15 1120149658760
16 7677619978602
17 52623190191455
18 360684711361584
19 2472169789339634
20 16944503814015855
21 116139356908771352
22 796030994547383610

List of values

[0, 2, 15, 104, 714, 4895, 33552, 229970, 1576239, 10803704, 74049690, 507544127, 3478759200, 23843770274, 163427632719, 1120149658760, 7677619978602, 52623190191455, 360684711361584, 2472169789339634, 16944503814015855, 116139356908771352, 796030994547383610]

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

Content is available under The OEIS End-User License Agreement.