a(n) = [ (2nd elementary symmetric function of S(n))/(first elementary symmetric function of S(n)) ], where S(n) = {first n+1 positive integers congruent to 1 mod 4}.
A024385
a(n) = [ (2nd elementary symmetric function of S(n))/(first elementary symmetric function of S(n)) ], where S(n) = {first n+1 positive integers congruent to 1 mod 4}.
Terms
- a(0) =0a(1) =3a(2) =9a(3) =16a(4) =25a(5) =36a(6) =49a(7) =64a(8) =82a(9) =101a(10) =122a(11) =145a(12) =170a(13) =197a(14) =227a(15) =258a(16) =291a(17) =326a(18) =363a(19) =402a(20) =444a(21) =487a(22) =532a(23) =579a(24) =628a(25) =679a(26) =733a(27) =788a(28) =845a(29) =904
External references
- oeis: A024385