1454365domain: NAppears in sequencesa(n) = Sum{a(k): k=0,1,2,...,n-4,n-2,n-1}; a(n-3) is not a summand; initial terms are 2,2,3.at n=23A049873Number of (2,n)-partitions of a chain of length n^3.at n=11A055659Triangular numbers that for some k >= 1 are also the sum of the first k odd primes.at n=3A364799