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.

A127739 Triangle read by rows, in which row n contains the triangular number T(n) = A000217(n) repeated n times; smallest triangular number greater than or equal to n.

Table of values

n a(n)
1 1
2 3
3 3
4 6
5 6
6 6
7 10
8 10
9 10
10 10
11 15
12 15
13 15
14 15
15 15
16 21
17 21
18 21
19 21
20 21
21 21
22 28
23 28
24 28
25 28
26 28
27 28
28 28
29 36
30 36
31 36
32 36
33 36
34 36
35 36
36 36
37 45
38 45
39 45
40 45
41 45
42 45
43 45
44 45
45 45
46 55
47 55
48 55
49 55
50 55
51 55
52 55
53 55
54 55
55 55
56 66
57 66
58 66
59 66
60 66
61 66
62 66
63 66
64 66
65 66
66 66

List of values

[1, 3, 3, 6, 6, 6, 10, 10, 10, 10, 15, 15, 15, 15, 15, 21, 21, 21, 21, 21, 21, 28, 28, 28, 28, 28, 28, 28, 36, 36, 36, 36, 36, 36, 36, 36, 45, 45, 45, 45, 45, 45, 45, 45, 45, 55, 55, 55, 55, 55, 55, 55, 55, 55, 55, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66, 66]

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

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