a(n) = floor(floor(S3)/floor(S1)), where S3 and S1 are, respectively, the 3rd and first elementary symmetric functions of {sqrt(k), k = 1,2,...,n}.

A025200

a(n) = floor(floor(S3)/floor(S1)), where S3 and S1 are, respectively, the 3rd and first elementary symmetric functions of {sqrt(k), k = 1,2,...,n}.

Terms

    a(0) =0a(1) =2a(2) =5a(3) =11a(4) =18a(5) =28a(6) =42a(7) =60a(8) =82a(9) =107a(10) =140a(11) =176a(12) =218a(13) =267a(14) =324a(15) =389a(16) =455a(17) =538a(18) =622a(19) =726a(20) =830a(21) =945a(22) =1072a(23) =1211a(24) =1363a(25) =1513a(26) =1692a(27) =1868a(28) =2076a(29) =2282

External references