OFFSET
1,1
COMMENTS
There is no further term < 3*10^9.
a(11) > 3*10^12. [Donovan Johnson, Jun 14 2009]
EXAMPLE
41630193 is in the sequence because 41630193 is the 39103614th composite number.
MATHEMATICA
Do[s=FromDigits[Reverse[IntegerDigits[n]]]; If[s<n&&!PrimeQ[n] &&s==n-PrimePi[n]-1, Print[n]], {n, 2, 42000000}]
CROSSREFS
KEYWORD
base,more,nonn
AUTHOR
Farideh Firoozbakht, Dec 10 2004
EXTENSIONS
a(9)-a(10) from Donovan Johnson, Jun 14 2009
STATUS
approved