OFFSET
1,1
COMMENTS
Alternatively: Primes formed from reverse concatenation of n and nextprime(n).
LINKS
K. D. Bajpai, Table of n, a(n) for n = 1..10000
EXAMPLE
53 is in the sequence because it is prime formed from concatenation of 5 and 3, where 5 is next prime after 3.
3733 is in the sequence because it is prime formed from concatenation of 37 and 33, where 37 is next prime after 33.
MATHEMATICA
Select[Table[FromDigits[Join[IntegerDigits[NextPrime[n]], IntegerDigits[n]]], {n, 1000}], PrimeQ]
PROG
(Magma) [p : n in[1 .. 200] | IsPrime(p) where p is Seqint(Intseq(n) cat Intseq(NextPrime(n)))];
CROSSREFS
KEYWORD
nonn,base
AUTHOR
K. D. Bajpai, Jan 04 2017
STATUS
approved