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.

A061900 Triangular numbers that are not squarefree.

Table of values

n a(n)
1 28
2 36
3 45
4 120
5 136
6 153
7 171
8 276
9 300
10 325
11 351
12 378
13 496
14 528
15 630
16 666
17 780
18 820
19 990
20 1035
21 1128
22 1176
23 1225
24 1275
25 1431
26 1485
27 1540
28 1596
29 1953
30 2016
31 2080
32 2556
33 2628
34 2775
35 2850
36 3160
37 3240
38 3321
39 3828
40 3916
41 4005
42 4095
43 4560
44 4656
45 4753
46 4851

List of values

[28, 36, 45, 120, 136, 153, 171, 276, 300, 325, 351, 378, 496, 528, 630, 666, 780, 820, 990, 1035, 1128, 1176, 1225, 1275, 1431, 1485, 1540, 1596, 1953, 2016, 2080, 2556, 2628, 2775, 2850, 3160, 3240, 3321, 3828, 3916, 4005, 4095, 4560, 4656, 4753, 4851]

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

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