70130

Appears in sequences

• Numbers k such that the continued fraction for sqrt(k) has odd period and if the last term of the periodic part is deleted the two central terms are both 17.at n=34A031605
• Numbers k such that 4*5^k + 1 is prime.at n=13A204322
• a(n) = a(n-1) + a(n-3) + a(n-4), where a(0) = 2, a(1) = 2, a(2) = 2, a(3) = 1.at n=24A295691
• Numbers k such that (35*10^k - 377)/9 is prime.at n=19A295967