47721domain: NAppears in sequencesSuccessive sums of consecutive primes that form a triangular grid.at n=15A125130Semiprimes in A007504 (the sum of first n primes).at n=33A189072Number of 6 X n 0..1 arrays with diagonals and antidiagonals unimodal and rows nondecreasing.at n=8A223953