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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.

A068650 Primes in which a string of 1's is sandwiched between two 3's.

Table of values

n a(n)
1 313
2 3111111111113
3 311111111111113
4 3111111111111111111111111111113
5 311111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111113

List of values

[313, 3111111111113, 311111111111113, 3111111111111111111111111111113, 311111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111113]

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

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