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.

A103218 Triangle read by rows: T(n, k) = (2*k+1)*(n+1-k)^2.

Table of values

n a(n)
0 1
1 4
2 3
3 9
4 12
5 5
6 16
7 27
8 20
9 7
10 25
11 48
12 45
13 28
14 9
15 36
16 75
17 80
18 63
19 36
20 11
21 49
22 108
23 125
24 112
25 81
26 44
27 13
28 64
29 147
30 180
31 175
32 144
33 99
34 52
35 15
36 81
37 192
38 245
39 252
40 225
41 176
42 117
43 60
44 17
45 100
46 243
47 320
48 343
49 324
50 275
51 208
52 135
53 68
54 19
55 121
56 300
57 405
58 448
59 441
60 396
61 325
62 240

List of values

[1, 4, 3, 9, 12, 5, 16, 27, 20, 7, 25, 48, 45, 28, 9, 36, 75, 80, 63, 36, 11, 49, 108, 125, 112, 81, 44, 13, 64, 147, 180, 175, 144, 99, 52, 15, 81, 192, 245, 252, 225, 176, 117, 60, 17, 100, 243, 320, 343, 324, 275, 208, 135, 68, 19, 121, 300, 405, 448, 441, 396, 325, 240]

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

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