11189025

Appears in sequences

• a(n) = A322244(n)^2, the square of the central coefficient in (1 + 3*x + 16x^2)^n.at n=4A322245
• Odd squares k for which A379113(k) > 1, i.e., k that have a proper unitary divisor d > 1 such that A048720(A065621(sigma(d)),sigma(k/d)) is equal to sigma(k).at n=19A379121