OFFSET
1,1
LINKS
Aaron Toponce, Table of n, a(n) for n = 1..10000
EXAMPLE
253 is in the sequence because 253 = 11 * 23 and 23 is the concatenation of 2 and 3 (first and last digit of 253).
MATHEMATICA
fQ[ n_ ] := Block[ {id = IntegerDigits[ n ]}, IntegerQ[ n / FromDigits[ {id[ [ 1 ] ], id[ [ -1 ] ]} ] ] ]; Select[ Range[ 100, 461 ], fQ[ # ] & ] (* Robert G. Wilson v, Jul 19 2005 *)
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Luca Colucci, Jul 01 2005
EXTENSIONS
Corrected and extended by Robert G. Wilson v, Jul 19 2005
STATUS
approved