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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.

A264842 a(n) is least number > 0 such that the concatenation of a(1) ... a(n) is 13-gonal: (11n^2 - 9n)/2.

Table of values

n a(n)
1 1
2 3
3 36
4 54765
5 123152388
6 374848814886363636
7 85794018663817263665487289502938826
8 107072047880615405294526336549204869795454545454545454545454545454545466

List of values

[1, 3, 36, 54765, 123152388, 374848814886363636, 85794018663817263665487289502938826, 107072047880615405294526336549204869795454545454545454545454545454545466]

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

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