1416100

Appears in sequences

• k^2 is a term if k^2 + (k-1)^2 and k^2 + (k+1)^2 are primes.at n=33A075577
• Squares of second pentagonal numbers: a(n) = (1/4)*n^2*(3*n+1)^2.at n=28A100256
• Triangle T(n, k, m) = b(n,m)/(b(k,m)*b(n-k,m)), where b(n, k) = Product_{j=1..n} (1 - ChebyshevT(j, k+1)^2), b(n, 0) = n!, and m = 2, read by rows.at n=12A156645
• Numbers with prime factorization p^2*q^2*r^2*s^2 where p, q, r, and s are distinct primes.at n=19A190377
• Numbers k such that (65*k)^2 can be represented in exactly 4 ways as the sum of a positive square and a positive fourth power.at n=23A346594
• Minimal square obtained by concatenating n distinct nonzero squares in ascending order.at n=3A391022