110618

Appears in sequences

• Number of 4-element subsets that can be chosen from {1,2,...,4*n} having element sum 8*n+2.at n=40A204468
• Squarefree numbers k such that alpha(k) = lambda(k), where alpha(k) = LCM of all (p+1) for primes p dividing k, and lambda(k) = A002322(k).at n=16A287514