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.

User: Robert Xiao

Robert Xiao's wiki page.

Robert Xiao has authored 2 sequences.

A358207 Numbers k such that k^2 + 2 is a palindrome.

Original entry on oeis.org

0, 1, 2, 3, 8, 13, 19, 85, 258, 393, 828, 1811, 2538, 2916, 2986, 3627, 4540, 10503, 140833, 268865, 298436, 423437, 902696, 1050503, 1845571, 2491032, 5513951, 14365940, 25809892, 26237622, 28559254, 61875091, 79094282, 186062629, 246553448, 451977320, 452357920, 620208559, 813448358, 849937635
Offset: 1

Views

Author

Robert Xiao, Nov 04 2022

Keywords

Crossrefs

Cf. A358237, A059100, A027719, A002778, A070253.

Programs

  • PARI
    isok(k) = my(d=digits(k^2+2)); d == Vecrev(d); \\ Michel Marcus, Nov 04 2022

A358237 Palindromes of the form k^2 + 2.

Original entry on oeis.org

2, 3, 6, 11, 66, 171, 363, 7227, 66566, 154451, 685586, 3279723, 6441446, 8503058, 8916198, 13155131, 20611602, 110313011, 19833933891, 72288388227, 89064046098, 179298892971, 814860068418, 1103556553011, 3406132316043, 6205240425026, 30403655630403, 206380232083602, 666150525051666
Offset: 1

Views

Author

Robert Xiao, Nov 04 2022

Keywords

Crossrefs

Cf. A059100, A358207, A070254, A002779.

Programs

  • Mathematica
    Select[Range[0,26*10^6]^2+2,PalindromeQ] (* Harvey P. Dale, Sep 01 2024 *)

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