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A215689 Smallest prime whose decimal expansion consists of the concatenation of a 1-digit square, a 2-digit square, a 3-digit square, ..., and an n-digit square, or 0 if there is no such prime. 1
0, 149, 125441, 1161002209, 116100102414161, 116100102410000106929, 1161001024100001004891442401, 116100102410000100489100000010169721, 116100102410000100489100000010004569100460529, 1161001024100001004891000000100045691000000001009269361 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..10.

EXAMPLE

a(2) = 149, which is a prime, and the concatenation of 1 = 1^2 with 49 = 7^2.

a(3) = 125441, which is a prime, and the 1 = 1^2 with 25 = 5^2 with 441 = 21^2.

CROSSREFS

Cf. A000040, A000290, A215641, A215647.

Sequence in context: A188566 A188753 A188873 * A104262 A048706 A054729

Adjacent sequences:  A215686 A215687 A215688 * A215690 A215691 A215692

KEYWORD

nonn,base

AUTHOR

Jonathan Vos Post, Aug 20 2012

EXTENSIONS

More terms from Alois P. Heinz, Aug 21 2012

STATUS

approved

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Last modified September 24 07:28 EDT 2020. Contains 337317 sequences. (Running on oeis4.)