[ (4th elementary symmetric function of P(n))/(2nd elementary symmetric function of P(n)) ], where P(n) = {1, p(1), p(2), ..., p(n-1)}, where p(0) = 1.

A024535

[ (4th elementary symmetric function of P(n))/(2nd elementary symmetric function of P(n)) ], where P(n) = {1, p(1), p(2), ..., p(n-1)}, where p(0) = 1.

Terms

    a(0) =0a(1) =3a(2) =13a(3) =37a(4) =87a(5) =180a(6) =341a(7) =612a(8) =1019a(9) =1638a(10) =2520a(11) =3696a(12) =5258a(13) =7345a(14) =10085a(15) =13456a(16) =17722a(17) =22936a(18) =29094a(19) =36577a(20) =45419a(21) =55969a(22) =68677a(23) =83398a(24) =100048a(25) =119035a(26) =140228a(27) =164100a(28) =192823a(29) =225035

External references