71142

Appears in sequences

• Number of n-digit reversible primes (emirps).at n=6A048054
• Row sums of triangle A105542, which equals the matrix square of triangle A105540.at n=13A105544
• Riordan array (f(x), x*f(x)) where f(x) is the g.f. of A064613.at n=37A171568