1141920

Appears in sequences

• Triangle of coefficients of certain Sheffer-polynomials.at n=22A048870
• Positive integers n such that n^2 = (x^4 - y^4)*(z^4 - t^4) where x>y and z>t are distinct pairs of integers with gcd(x,y)=gcd(z,t)=1.at n=30A147856