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.

A240927 Positive integers with 2k digits (the first of which is not 0) where the sum of the first k digits equals the sum of the last k digits.

Table of values

n a(n)
1 11
2 22
3 33
4 44
5 55
6 66
7 77
8 88
9 99
10 1001
11 1010
12 1102
13 1111
14 1120
15 1203
16 1212
17 1221
18 1230
19 1304
20 1313
21 1322
22 1331
23 1340
24 1405
25 1414
26 1423
27 1432
28 1441
29 1450
30 1506
31 1515
32 1524
33 1533
34 1542
35 1551
36 1560
37 1607
38 1616
39 1625
40 1634
41 1643
42 1652
43 1661
44 1670
45 1708
46 1717

List of values

[11, 22, 33, 44, 55, 66, 77, 88, 99, 1001, 1010, 1102, 1111, 1120, 1203, 1212, 1221, 1230, 1304, 1313, 1322, 1331, 1340, 1405, 1414, 1423, 1432, 1441, 1450, 1506, 1515, 1524, 1533, 1542, 1551, 1560, 1607, 1616, 1625, 1634, 1643, 1652, 1661, 1670, 1708, 1717]