69481

Properties

Appears in sequences

• Primes whose reversal is a square.at n=22A007488
• Expansion of x/(1 - 5*x - 11*x^2).at n=7A015547
• Let p(k) denote k-th prime; consider solutions (p(n),p(m)) of Diophantine equation p(p(n)+1)-6.p(p(m))=1 (*), where p(p(n)) belongs to A060213 and p(p(m))=(p(p(n))+1)/6; sequence gives values of p(n).at n=9A065505
• Primes whose digit reversal is a nontrivial power.at n=25A069798
• Primes p giving prime quadruples (30p+11, 30p+13, 30p+17, 30p+19).at n=28A087771
• Prime numbers whose digit reversal is a powerful(1) number (A001694).at n=36A115685
• Same as A007488, but with the numbers arranged so that their reversals are in increasing order.at n=15A132388
• Expansion of (-3*x^2 + x - 1)/(x^3 - 3*x^2 + x - 1).at n=27A200715
• Squares of triangular numbers, written backwards.at n=15A229701
• Greatest prime factor of n^9+1.at n=19A240552
• Primes p such that both (p^2 + 5)/6 and (p^4 + 5)/6 are prime.at n=41A253925
• Primes containing nonprime digits (from 1 to 9) in their decimal expansion and whose digits are distinct, i.e., consisting of only digits 1, 4, 6, 8, 9.at n=30A323391
• Prime numbersat n=6898