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.

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A349665 Record terms of A349664.

Original entry on oeis.org

0, 1, 2, 3, 7, 17, 27, 37, 87, 137, 157, 187, 247, 437, 687, 787, 937, 1237, 2187, 3437, 3937, 4687, 6187, 8437, 10937, 17187, 19687, 23437, 30937, 42187, 54687, 55687, 85937, 98437, 117187, 154687, 210937, 223437, 273437, 278437, 304687, 429687, 492187, 585937
Offset: 1

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Author

Karl-Heinz Hofmann, Dec 18 2021

Keywords

Comments

Terms are the record numbers of solutions for the equation: y^4 = z^2 - x^2.

Examples

			Number of | y | Factorization
solutions |   |      of y
----------+---+--------------
        0 | 1 |  -
        1 | 2 | [2]
        2 | 3 | [3]
        3 | 4 | [2, 2]
        7 | 6 | [2, 3]
        :   :      :
For more terms with y and factorization of y see link.
		

Crossrefs

Programs

  • PARI
    lista(nn) = my(f, r); print1("0, 1, 2"); forstep(n=4, nn, 2, f=factor(n)[, 2]; if(rJinyuan Wang, Dec 19 2021

Extensions

More terms from Jinyuan Wang, Dec 19 2021
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