151149

Appears in sequences

• List of pairs of primes in reverse order.at n=17A007797
• Number of permutations satisfying -k<=p(i)-i<=r and p(i)-i not in I, i=1..n, with k=3, r=3, I={-1,0,2}.at n=24A079987
• Concatenation of twin primes in reverse order.at n=11A107309
• Semiprimes that are the concatenation of a prime and the previous prime.at n=8A242102