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.

A135999 Numbers that are both triangular numbers A000217 and triangle-shaped numbers A134999.

Table of values

n a(n)
1 105
2 120
3 136
4 153
5 171
6 190
7 231
8 253
9 276
10 300
11 325
12 351
13 378
14 406
15 435
16 465
17 496
18 528
19 561
20 595
21 703
22 780
23 820
24 861
25 903
26 946
27 990
28 1596
29 1711
30 2145
31 2346
32 3240
33 3321
34 3486
35 3570
36 3741
37 4371
38 4560
39 4753
40 5565

List of values

[105, 120, 136, 153, 171, 190, 231, 253, 276, 300, 325, 351, 378, 406, 435, 465, 496, 528, 561, 595, 703, 780, 820, 861, 903, 946, 990, 1596, 1711, 2145, 2346, 3240, 3321, 3486, 3570, 3741, 4371, 4560, 4753, 5565]

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

Content is available under The OEIS End-User License Agreement.