

A116169


Numbers n such that n concatenated with n+1 gives the product of two numbers which differ by 9.


8




OFFSET

1,1


COMMENTS

Also numbers n such that n concatenated with n+9 gives the product of two numbers which differ by 7.


LINKS

Table of n, a(n) for n=1..5.


EXAMPLE

49//50 = 66 * 75, where // denotes concatenation.
49//58 = 67 * 74.


CROSSREFS

Cf. A116162, A116168, A116175, A116300.
Cf. A116215, A116174, A116223, A116353.
Sequence in context: A088064 A080812 A276239 * A280549 A084367 A006974
Adjacent sequences: A116166 A116167 A116168 * A116170 A116171 A116172


KEYWORD

nonn,base


AUTHOR

Giovanni Resta, Feb 06 2006


EXTENSIONS

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


STATUS

approved



