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.

A069048 Numbers k such that (i) k is a concatenation of consecutive natural numbers starting at 1 and (ii) k+1 is prime.

Table of values

n a(n)
1 1
2 12
3 123456
4 123456789101112131415161718192021222324252627282930
5 12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364656667686970717273747576777879808182838485868788

List of values

[1, 12, 123456, 123456789101112131415161718192021222324252627282930, 12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364656667686970717273747576777879808182838485868788]

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

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