A116337 Numbers k such that k*(k+4) gives the concatenation of two numbers m and m+7.

8217108, 8030443878983905982, 43467818511541680701794365325328847002052, 56532181488458319298205634674671152997945

Offset

1,1

Links

Table of n, a(n) for n=1..4.

Example

8217108 * 8217112 = 6752089//6752096, where // denotes concatenation.

Crossrefs

Cf. A116173, A116323, A116336, A116338, A116350.

Cf. A116304, A116257.

Sequence in context: A059693 A083629 A116304 * A234049 A233484 A363792

Adjacent sequences: A116334 A116335 A116336 * A116338 A116339 A116340

Keyword

nonn,base

Author

Giovanni Resta, Feb 06 2006

Status

approved