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.

A067269 Triangular numbers which remain triangular when the most significant digit is moved to the end.

Table of values

n a(n)
1 1
2 3
3 6
4 10
5 55
6 66
7 300
8 325
9 666
10 1035
11 1485
12 1891
13 61776
14 103740
15 109746
16 112575
17 190653
18 340725
19 1026028
20 1264845
21 3000025
22 3002475
23 3592540
24 3670695
25 37840650
26 60000535
27 61577253
28 65008503
29 1001393128
30 1432436050
31 1560756385

List of values

[1, 3, 6, 10, 55, 66, 300, 325, 666, 1035, 1485, 1891, 61776, 103740, 109746, 112575, 190653, 340725, 1026028, 1264845, 3000025, 3002475, 3592540, 3670695, 37840650, 60000535, 61577253, 65008503, 1001393128, 1432436050, 1560756385]

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

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