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.

A093406 a(n) = 4*a(n-1) - 6*a(n-2) + 4*a(n-3) + a(n-4).

Table of values

n a(n)
1 1
2 3
3 11
4 31
5 71
6 145
7 289
8 601
9 1321
10 2979
11 6683
12 14743
13 32111
14 69697
15 151777
16 332113
17 728689
18 1598883
19 3503627
20 7668079
21 16774775
22 36704017
23 80343361
24 175916521
25 385196761
26 843365379
27 1846290395
28 4041672871
29 8847607391
30 19368919297
31 42403014721
32 92830645537

List of values

[1, 3, 11, 31, 71, 145, 289, 601, 1321, 2979, 6683, 14743, 32111, 69697, 151777, 332113, 728689, 1598883, 3503627, 7668079, 16774775, 36704017, 80343361, 175916521, 385196761, 843365379, 1846290395, 4041672871, 8847607391, 19368919297, 42403014721, 92830645537]