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A046486 Numbers n such that sum of the first n palindromes is a palindrome. 3
1, 2, 3, 12, 16, 47, 314 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..7.

P. De Geest, World!Of Numbers

EXAMPLE

a(n)=47 so 1+2+3+...+373+383 (47 terms) = 7557.

MATHEMATICA

palQ[n_] := Reverse[x = IntegerDigits[n]] == x; t = Select[Range[25000], palQ[#] &]; Flatten[Rest[Position[Accumulate[t], _?palQ]]] (* Jayanta Basu, Jun 26 2013 *)

CROSSREFS

Cf. A002113, A046487, A046488.

Sequence in context: A123761 A181121 A047163 * A073452 A112976 A100570

Adjacent sequences:  A046483 A046484 A046485 * A046487 A046488 A046489

KEYWORD

nonn,hard,base

AUTHOR

Patrick De Geest, Sep 15 1998.

STATUS

approved

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Last modified March 22 10:07 EDT 2019. Contains 321421 sequences. (Running on oeis4.)