1046181domain: NAppears in sequencesSum of the three largest parts in the partitions of 4n into 4 parts.at n=27A243011Triangular numbers T(i) that can be expressed as the sum of 2 positive triangular numbers, T(j)+T(k), and for which i+j+k is a triangular number, where T is A000217.at n=18A343426