Second elementary symmetric function of the first n terms of (1,2,4,8,...).

A203241

Second elementary symmetric function of the first n terms of (1,2,4,8,...).

Terms

    a(0) =2a(1) =14a(2) =70a(3) =310a(4) =1302a(5) =5334a(6) =21590a(7) =86870a(8) =348502a(9) =1396054a(10) =5588310a(11) =22361430a(12) =89462102a(13) =357881174a(14) =1431590230a(15) =5726491990a(16) =22906230102a(17) =91625444694a(18) =366502827350

External references