79729

Appears in sequences

• Strong pseudoprimes to base 72.at n=31A020298
• a(n) = T(2n-1,n), where T is the array defined in A024996.at n=7A026072
• Start with 1 and repeatedly reverse the digits and add 66 to get the next term.at n=20A118200
• Numbers k such that 4*10^k - 87 is prime.at n=22A284191
• a(n) = Sum_{k=1..n} binomial(2*n, k) * sigma_2(k).at n=5A356342