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.

A348407 a(n) = ((n+1)*3*2^(n+1) + 29*2^n + (-1)^n)/9.

Table of values

n a(n)
0 4
1 9
2 21
3 47
4 105
5 231
6 505
7 1095
8 2361
9 5063
10 10809
11 22983
12 48697
13 102855
14 216633
15 455111
16 953913
17 1995207
18 4165177
19 8679879
20 18058809
21 37515719
22 77827641
23 161247687
24 333680185
25 689729991
26 1424199225
27 2937876935
28 6054710841
29 12467335623
30 25650499129
31 52732654023
32 108328619577

List of values

[4, 9, 21, 47, 105, 231, 505, 1095, 2361, 5063, 10809, 22983, 48697, 102855, 216633, 455111, 953913, 1995207, 4165177, 8679879, 18058809, 37515719, 77827641, 161247687, 333680185, 689729991, 1424199225, 2937876935, 6054710841, 12467335623, 25650499129, 52732654023, 108328619577]