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A217247 Numbers that can be obtained by inserting multiplication signs among the digits of their squares. 1
1, 3168, 33696, 322056, 422352, 801792, 3408048, 13304736, 24772608, 26836992, 31959648, 43932456, 98558208, 152845056, 238267008, 250677504, 362330496, 413779968, 511967232, 567502848, 646507008, 1060190208, 1273234464, 1288514304, 1503330304 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

The first nontrivial term such that the resulting multiplicands have no leading zeros is given by 152845056^2 = 23361611143643136 and 2*3*3*6*1*6*1*1*14*3*6*4*3*13*6 = 152845056.

LINKS

Giovanni Resta, Table of n, a(n) for n = 1..55

Giovanni Resta, Decompositions for the first 55 terms

EXAMPLE

3168 is in the sequence since its square is 10036224 and 1*0036*22*4 = 3168.

CROSSREFS

Cf. A179482.

Sequence in context: A324678 A068266 A140350 * A020420 A155484 A129472

Adjacent sequences:  A217244 A217245 A217246 * A217248 A217249 A217250

KEYWORD

nonn,base

AUTHOR

Giovanni Resta, Mar 16 2013

EXTENSIONS

Typo in example corrected by Christian N. K. Anderson, Apr 04 2013

STATUS

approved

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Last modified June 20 19:36 EDT 2019. Contains 324234 sequences. (Running on oeis4.)