65820domain: NAppears in sequencesa(n) = sum of n-th row of the triangle formed by replacing each m in Pascal's triangle with the m-th prime.at n=13A074663Number of triangles on a 4 X n grid.at n=18A296367Integers k such that there are i groups of order k+i up to isomorphism, for i=1,2,3.at n=36A373649