38163domain: NAppears in sequencesConcatenate n with n-th prime.at n=37A045532Number of 5-element intersecting families of an n-element set.at n=5A051182Numbers m such that the square of m is the concatenation of two numbers k and k+5.at n=4A115439Sequence whose Hankel transform is a (1,1) Somos-4 sequence.at n=18A174013