OFFSET
1,1
LINKS
Zak Seidov, Table of n, a(n) for n = 1..328
EXAMPLE
The first term is 10987 which is a prime and is the reverse concatenation of 7,8,9 and 10 which are four consecutive numbers.
MATHEMATICA
Select[Table[FromDigits[Flatten[IntegerDigits/@Range[n, n-3, -1]]], {n, 4, 400}], PrimeQ] (* Harvey P. Dale, Aug 02 2021 *)
PROG
(PARI) forstep(n=10, 400, 2, isprime(t=eval(Str(n, n-1, n-2, n-3)))&print1(t", ")) \\ Zak Seidov, May 08 2013
CROSSREFS
KEYWORD
base,nonn
AUTHOR
Shyam Sunder Gupta, Apr 17 2005
STATUS
approved