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.

A291734 p-INVERT of (1,0,1,0,0,0,0,...), where p(S) = (1 - S)(1 - 2 S).

Table of values

n a(n)
0 3
1 7
2 18
3 45
4 108
5 258
6 615
7 1459
8 3453
9 8164
10 19287
11 45540
12 107496
13 253695
14 598659
15 1412587
16 3332970
17 7863853
18 18553752
19 43774722
20 103279023
21 243668295
22 574890057
23 1356344056
24 3200033343
25 7549859464
26 17812425600
27 42024945087
28 99149648967
29 233924207559

List of values

[3, 7, 18, 45, 108, 258, 615, 1459, 3453, 8164, 19287, 45540, 107496, 253695, 598659, 1412587, 3332970, 7863853, 18553752, 43774722, 103279023, 243668295, 574890057, 1356344056, 3200033343, 7549859464, 17812425600, 42024945087, 99149648967, 233924207559]