88059domain: NAppears in sequencesa(n) = Sum_{k=floor((n+1)/2)..n} T(k,n-k); i.e., a(n) is the n-th diagonal sum of left-justified array T given by A026998.at n=27A027010Number of partitions of the n-th n-gonal pyramidal number into distinct n-gonal pyramidal numbers.at n=55A337798