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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.

User: Bernard Pitie

Bernard Pitie's wiki page.

Bernard Pitie has authored 1 sequences.

A346368 Odd numbers that can be written in a single way as 2*k^2+p, k>0, p prime.

Original entry on oeis.org

5, 7, 9, 11, 23, 27, 29, 33, 41, 47, 53, 57, 59, 65, 71, 83, 95, 107, 113, 123, 143, 149, 161, 197, 233, 239, 257, 281, 287, 317, 323, 347, 383, 407, 413, 443, 449, 569, 743, 773, 785, 863, 1227, 1367, 1415, 1703, 1787, 2123, 2507, 2933, 3317, 3515, 3713, 4673, 5987, 6797
Offset: 1

Views

Author

Bernard Pitie, Jul 14 2021

Keywords

Comments

The next element, if it exists, is greater than 10^8.

Crossrefs

Cf. A060003, A046920, A046921, A046923,

Programs

  • PARI
    isok(m) = (m>3) && (m % 2) && (sum(i=1, sqrtint((m-3)/2), isprime(m-2*i^2)) == 1); \\ Michel Marcus, Jul 22 2021

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