A053779 Numbers k such that the sum of the first k composite numbers is palindromic.

1, 22, 24, 167, 202, 226, 1443, 2380, 3190, 3952, 4220, 16827, 26304, 37612, 40813, 213501, 376524, 1920079, 2061085, 2635057, 3463613, 4268588, 16513206, 68101132, 166428703, 207224360, 403784450, 421279478, 1384813481

Offset: 1

Author

G. L. Honaker, Jr., Mar 29 2000

Keywords

• base
• nonn

Comments

Sequence lists numbers k such that 4 + 6 + 8 + 9 + 10 + 12 + ... + composite(k) is palindromic. For the corresponding values of composite(k) see A057959.

Links

• P. De Geest, Palindromic Sums
• C. Rivera, PrimePuzzle 89

Crossrefs

Cf. A002808, A002113, A053780.

Programs

Mathematica

Position[Accumulate[Select[Range[146*10^7],CompositeQ]],?(PalindromeQ[ #] &)] // Flatten (* _Harvey P. Dale, Sep 29 2018 *)

Extensions

More terms from G. L. Honaker, Jr., Mar 29 2000

Further terms added by Patrick De Geest, Nov 15 2000