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A058847 Palindromes that are the sum of consecutive initial odd primes. 3
3, 8, 5115, 6336, 81218, 3091903, 7843487, 792727297, 37706560773, 30398022089303, 263888373888362, 81120957675902118 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

3 + 5 + 7 + 11 + 13 + 17 + ... + z = n. For values of z see A058846.

a(13) > 1.2*10^26, if it exists. - Giovanni Resta, Sep 01 2018

LINKS

Table of n, a(n) for n=1..12.

P. De Geest, Palindromic Sums

FORMULA

a(n) = A071148(A058845(n)). - R. J. Mathar, Sep 09 2015

MATHEMATICA

palQ[n_]:=Module[{idn=IntegerDigits[n]}, idn==Reverse[idn]]; Select[ Accumulate[ Prime[Range[2, 25000000]]], palQ] (* The program takes a long time to run and only generates the first 11 terms of the sequence *) (* Harvey P. Dale, Aug 24 2014 *)

CROSSREFS

Cf. A058845, A058846, A038583.

Sequence in context: A268141 A278974 A063103 * A088110 A122759 A247042

Adjacent sequences:  A058844 A058845 A058846 * A058848 A058849 A058850

KEYWORD

nonn,base,more

AUTHOR

Patrick De Geest, Dec 15 2000

STATUS

approved

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Last modified June 5 16:19 EDT 2020. Contains 334852 sequences. (Running on oeis4.)