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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.

A264848 a(n) is least number > 0 such that the concatenation of a(1) ... a(n) is 19-gonal: (17n^2 - 15n)/2.

Table of values

n a(n)
1 1
2 9
3 224
4 631909
5 58000804596
6 61688194098028272863216
7 2514637794509678630513616176470588235294117671
8 941048382372874985200592647058823529411764708485294117647058823529411764705882352941176469

List of values

[1, 9, 224, 631909, 58000804596, 61688194098028272863216, 2514637794509678630513616176470588235294117671, 941048382372874985200592647058823529411764708485294117647058823529411764705882352941176469]

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

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