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.

A277228 Convolution of the even-indexed triangular numbers (A014105) and the squares (A000290).

Table of values

n a(n)
0 0
1 0
2 3
3 22
4 88
5 258
6 623
7 1316
8 2520
9 4476
10 7491
11 11946
12 18304
13 27118
14 39039
15 54824
16 75344
17 101592
18 134691
19 175902
20 226632
21 288442
22 363055
23 452364
24 558440
25 683540
26 830115
27 1000818
28 1198512
29 1426278
30 1687423
31 1985488
32 2324256
33 2707760
34 3140291
35 3626406

List of values

[0, 0, 3, 22, 88, 258, 623, 1316, 2520, 4476, 7491, 11946, 18304, 27118, 39039, 54824, 75344, 101592, 134691, 175902, 226632, 288442, 363055, 452364, 558440, 683540, 830115, 1000818, 1198512, 1426278, 1687423, 1985488, 2324256, 2707760, 3140291, 3626406]