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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.

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A144327 Prime numbers p such that p - 1 is the fourth a-figurate number and nineteenth b-figurate number for some a and b.

Original entry on oeis.org

191, 1217, 1559, 1901, 2243, 2927, 4637, 6689, 8741, 9767, 12161, 12503, 13187, 14897, 15581, 15923, 16607, 17291, 19001, 20369, 21737, 22079, 23447, 23789, 24473, 25841, 26183, 27551, 27893, 30971, 33023, 35759, 37811, 38153, 39521
Offset: 1

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Author

Reikku Kulon, Sep 17 2008

Keywords

Comments

Sequence of primes sufficient to determine the conjecture of A144326. Presumed to include many terms that cannot be Mersenne prime exponents, noting A096676: either infinitely many, or all.
These primes are very rare. There are only 10 less than 10000 and only 85 less than 100000.

Crossrefs

Cf. A096676, A144326
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