242172

Appears in sequences

• Averages of twin prime pairs k such that k*7 and k/7 are squares.at n=10A154673
• Integers of the form k = m^3+m^2 such that k-+1 are primes.at n=8A154733
• Triangle T(n, k, q) = Sum_{j=0..10} q^j * floor( binomial(n+1,k)*binomial(n-1,k-1)/(2^j*(n+1)) ) for q = 3, read by rows.at n=40A174045
• Integers m such that there exist one prime p and one positive integer k, for which the expression k^3 + k^2*p is a perfect cube m^3.at n=29A338610
• G.f.: Sum_{k>=0} x^(k*(k+1)) * Product_{j=1..k} ((1 + x^j)/(1 - x^j))^2.at n=37A376852