186649

Properties

Appears in sequences

• Beginning with 3, least member of A007500 such that concatenation of first n terms and its digit reversal both are primes.at n=26A111383
• a(n) = a(n - 1) + a(n - 2) + a(n - 3) for n>2, a(0)=5, a(1)=7, a(2)=9.at n=18A268410
• Prime numbersat n=16889