OFFSET
1,1
COMMENTS
a(9) has 625 digits, a(10) has 1476 digits, a(11) has 5048 digits, a(12) has 39024 digits.
LINKS
Arkadiusz Wesolowski, Table of n, a(n) for n = 1..10
G. L. Honaker, Jr. and Chris Caldwell, 24681...50451 (625-digits)
Henri & Renaud Lifchitz, PRP Records
MATHEMATICA
lst = {}; c = 0; Do[c = c*10^IntegerLength[n] + n; a = c - 1; If[PrimeQ[a], AppendTo[lst, a]]; b = c + 1; If[PrimeQ[b], AppendTo[lst, b]], {n, 2, 48, 2}]; lst
CROSSREFS
KEYWORD
base,nonn
AUTHOR
Arkadiusz Wesolowski, May 10 2012
STATUS
approved