OFFSET
1,1
COMMENTS
Subsequence of A202259.
LINKS
Stanislav Sykora, Table of n, a(n) for n = 1..10000
PROG
(PARI) isComposite(n) = (n>2)&&(!isprime(n));
isRightTruncatableComposite(n, b=10) = {my(k=b); if(!isComposite(n), return(0); ); while(n\k>0, if(!isComposite(n\k), return(0); ); k*=b); return(1); } \\ Stanislav Sykora, Feb 15 2015
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Jaroslav Krizek, Dec 25 2011
STATUS
approved