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.

A077293 Partition the concatenation 1234567...of natural numbers into successive strings nontrivially (a(n) is not equal to n) such that the n-th string is a multiple of n.

Table of values

n a(n)
1 12
2 34
3 567
4 8
5 910
6 111213141516
7 17181920
8 2122232425262728
9 293031
10 323334353637383940
11 41424344454647
12 48
13 49505152535455565758596061626364
14 6566
15 676869707172737475
16 767778798081828384
17 85
18 868788

List of values

[12, 34, 567, 8, 910, 111213141516, 17181920, 2122232425262728, 293031, 323334353637383940, 41424344454647, 48, 49505152535455565758596061626364, 6566, 676869707172737475, 767778798081828384, 85, 868788]