128244domain: NAppears in sequencesNumber of representations of n as a sum of products of pairs of positive integers, n = Sum_{k=1..m} i_k*j_k with i_k<=j_k, i_k<=i_{k+1}, j_k<=j_{k+1}, i_k*j_k<=i_{k+1}*j_{k+1}.at n=45A212214Numbers k such that (4*10^k - 19)/3 is prime.at n=24A289081