A116207 - OEIS

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A116207

Numbers k such that k concatenated with k+7 gives the product of two numbers which differ by 5.

493, 607, 629, 757, 17927, 33247, 93869, 19467217, 31223879, 72757727, 13454739732766891651472740499, 40093333713615672956030023507, 48089152118689474641229584727, 66424317743191484432891678269

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OFFSET

1,1

LINKS

Table of n, a(n) for n=1..14.

EXAMPLE

72757727//72757734 = 85298138 * 85298143, where // denotes concatenation.

CROSSREFS

Cf. A116167, A116114, A116200, A116173, A116208, A116180, A116338.

Sequence in context: A198531 A300058 A251540 * A363391 A264327 A045007

Adjacent sequences: A116204 A116205 A116206 * A116208 A116209 A116210

KEYWORD

nonn,base

AUTHOR

Giovanni Resta, Feb 06 2006

STATUS

approved