85697

Appears in sequences

• Divide odd numbers into groups with prime(n) elements and add together.at n=19A034960
• Numbers n such that n*phi(n-1) is a perfect square.at n=31A069069
• Structured disdyakis triacontahedral numbers (vertex structure 7).at n=16A100159
• a(n) = 128*n^2 - 32*n + 1.at n=25A157331
• a(n) = 128*n^2 + 2528*n + 12481.at n=15A157436
• Numerator of Euler(n,9).at n=5A157864
• Sequence defined by the recurrence formula a(n+1)=sum(a(p)*a(n-p)+k,p=0..n)+l for n>=1, with here a(0)=1, a(1)=2, k=0 and l=-1.at n=10A176678
• Smallest integer m > n such that both n*m and (n+1)*(m+1) are squares.at n=17A212651
• a(n) = n * (4*n + 3)^2.at n=17A322675
• Odd numbers k, not powers of primes, such that sigma(k) == 2 modulo 8 and sigma(sigma(k)) == 6 modulo 8.at n=13A332458
• Numbers k such that k and k+1 are both divisible by the square of their largest prime factor.at n=27A354558