A058848 - OEIS

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A058848

Numbers k such that the sum of the first k odd composites is palindromic.

1, 12, 25, 61, 108, 211, 1344, 2339, 10539, 78409, 283181, 1748747, 1795423, 2386702, 2819089, 179101605, 1923088106, 2822581688, 7794689270, 17381011919, 25635268093, 28780043265, 97973526253

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OFFSET

1,2

COMMENTS

Sequence is 9 + 15 + 21 + 25 + 27 + 33 + ... + z. For values of z see A058849.

LINKS

Table of n, a(n) for n=1..23.

Patrick De Geest, Palindromic Sums

CROSSREFS

Cf. A058849, A058850, A262044.

Sequence in context: A229447 A175523 A280391 * A292493 A042869 A041282

Adjacent sequences: A058845 A058846 A058847 * A058849 A058850 A058851

KEYWORD

nonn,base,more

AUTHOR

Patrick De Geest, Dec 15 2000

EXTENSIONS

a(20) from Donovan Johnson, Sep 01 2012

a(21)-a(23) from Chai Wah Wu, Dec 06 2019

STATUS

approved