66248

Appears in sequences

• Numbers whose square is expressible as the difference of positive cubes in more than one way.at n=1A051393
• Composite numbers k+1 such that k*phi(k+1) is a perfect square.at n=36A069068
• Transform of n^3 by the Riordan array (1/(1-x^2), x).at n=26A105636
• Triangle of the numbers of different forests of m unrooted trees of smallest order 2, i.e., without isolated vertices, on N labeled nodes.at n=29A105786
• Numbers of the form p^3*q^2*r^2 where p, q, and r are distinct primes.at n=28A179695
• a(n) = n^4/8 if n is even, a(n) = (n^2-1)^2/8 if n is odd.at n=27A212892
• Numbers whose square is both a sum and a difference of two positive cubes.at n=18A230716
• Sum of cubes of the first n even numbers (A016743).at n=13A254371
• Numbers n such that n is the sum of two nonzero squares while n^2 is the sum of two positive cubes.at n=38A273554
• Primitive coreful abundant numbers: coreful abundant numbers having no coreful abundant aliquot divisor.at n=26A339940