A116107 - OEIS

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A116107

Numbers k such that k concatenated with k-8 gives the product of two numbers which differ by 7.

52, 63716866, 48793687600063875363014809897052, 60020753655608135708762056127156, 60446518621981165303188950156776, 71135436903815748345367595855336, 72876856643103028189103298533248

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OFFSET

1,1

COMMENTS

Also numbers n such that n concatenated with n-2 gives the product of two numbers which differ by 5.

LINKS

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

EXAMPLE

63716866//63716864 = 79822843 * 79822848, where // denotes concatenation.

CROSSREFS

Cf. A116099, A116106, A115429, A116112, A116238, A115426, A116146, A116276.

Sequence in context: A198912 A208300 A038778 * A114787 A198776 A367821

Adjacent sequences: A116104 A116105 A116106 * A116108 A116109 A116110

KEYWORD

nonn,base

AUTHOR

Giovanni Resta, Feb 06 2006

EXTENSIONS

Edited by N. J. A. Sloane, Apr 15 2007

STATUS

approved