|
| |
|
|
A116193
|
|
Numbers k such that k concatenated with k+5 gives the product of two numbers which differ by 5.
|
|
11
|
|
|
|
11, 45, 18281, 32769, 56891, 180689, 330539, 959481, 1850201, 3247409, 4940219, 2425563239, 2575561739, 6003563495, 7245212645, 7770160145, 4983798265289, 5049762270381, 5534298528989, 5603798594169, 21894082450101
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
|
OFFSET
|
1,1
|
|
|
COMMENTS
|
Also numbers k such that k concatenated with k+9 gives the product of two numbers which differ by 3. For proof that this is the same sequence compare A116133.
Also numbers k such that k concatenated with k-9 gives the product of two numbers which differ by 9.
|
|
|
LINKS
|
Table of n, a(n) for n=1..21.
|
|
|
EXAMPLE
|
7770160145//7770160136 = 8814851183 * 8814851192, where // denotes concatenation.
|
|
|
CROSSREFS
|
Cf. A116205, A116187, A116349.
Cf. A116179, A115430, A116194, A116200, A116324.
Cf. A116099, A116109, A116231.
Sequence in context: A231438 A322560 A110114 * A282095 A063158 A081587
Adjacent sequences: A116190 A116191 A116192 * A116194 A116195 A116196
|
|
|
KEYWORD
|
nonn,base
|
|
|
AUTHOR
|
Giovanni Resta, Feb 06 2006
|
|
|
EXTENSIONS
|
Edited by N. J. A. Sloane, Apr 12 2007
|
|
|
STATUS
|
approved
|
| |
|
|
