

A116205


Numbers n such that n concatenated with n+7 gives the product of two numbers which differ by 3.


11



1, 81, 1353, 3997, 7723, 23761, 26271, 76771, 1415683, 3890571, 8495497, 1066870443, 1239366513, 4198438981, 4534273891, 6502317141, 6918679731, 2199164200036329043, 2820114781174460091, 5500888421709400741
(list;
graph;
refs;
listen;
history;
text;
internal format)



OFFSET

1,2


COMMENTS

Also numbers n such that n concatenated with n+9 gives the product of two numbers which differ by 1.
Also numbers n such that n concatenated with n3 gives the product of two numbers which differ by 7.


LINKS

Table of n, a(n) for n=1..20.


CROSSREFS

Cf. A116179, A116172, A115429, A116173, A116193, A116336.
Cf. A116132, A116099, A116139, A116152, A116269, A116348.
Sequence in context: A224014 A059977 A231912 * A237455 A253488 A236738
Adjacent sequences: A116202 A116203 A116204 * A116206 A116207 A116208


KEYWORD

nonn,base


AUTHOR

Giovanni Resta, Feb 06 2006


EXTENSIONS

Edited by N. J. A. Sloane, Apr 13 2007


STATUS

approved



