Least k such that 2nd elementary symmetric function of {1,2,...,k} >= 4th elementary symmetric function of {1,2,...,n}.
A027920
Least k such that 2nd elementary symmetric function of {1,2,...,k} >= 4th elementary symmetric function of {1,2,...,n}.
Terms
- a(0) =3a(1) =6a(2) =10a(3) =15a(4) =20a(5) =26a(6) =33a(7) =40a(8) =49a(9) =58a(10) =68a(11) =78a(12) =90a(13) =102a(14) =115a(15) =129a(16) =143a(17) =158a(18) =174a(19) =191a(20) =208a(21) =227a(22) =246a(23) =265a(24) =286a(25) =307a(26) =329a(27) =352a(28) =376a(29) =400
External references
- oeis: A027920