79599domain: NAppears in sequencesNumbers k that divide 7^k + 5^k.at n=39A045596a(n) = (p*(p+4)+1)/2 where (p,p+4) are the n-th cousin prime pair.at n=21A163634Number of shapes of left-leaning height-balanced AVL trees with n (inner) nodes.at n=37A296103