3157729

Appears in sequences

• Squares of the form k^2+(k+17)^2 with integer k.at n=9A156159
• a(n) = 34*a(n-1)-a(n-2)-2312 for n > 2; a(1)=169, a(2)=2809.at n=3A156160
• Let the n-th Carmichael number A002997(n) = p1*p2*...*pr, where p1 < p2 < ... < pr are primes. Then a(n) = (p1-1) * (p1*p2*...*pr - 1)^(r-2) / ((p2-1)*...*(pr-1)).at n=14A180044
• Powerful numbers (A001694) which can be written as the sum of two relatively prime 3-powerful numbers (A036966) different from 1.at n=30A210470
• Squares of the form x^3 + 2*y^3, with x, y > 0.at n=15A219728