a(n) = denominator(b(n)), where b(n) = b(n-1) + n if n is odd and b(n-1)*n/(b(n-1) + n) if n is even, with b(0) = 0.

A392571

a(n) = denominator(b(n)), where b(n) = b(n-1) + n if n is odd and b(n-1)*n/(b(n-1) + n) if n is even, with b(0) = 0.

Terms

    a(0) =1a(1) =1a(2) =3a(3) =3a(4) =23a(5) =23a(6) =33a(7) =33a(8) =601a(9) =601a(10) =2823a(11) =2823a(12) =81139a(13) =81139a(14) =393987a(15) =393987a(16) =15457523a(17) =15457523a(18) =8487321a(19) =8487321a(20) =84389441a(21) =84389441a(22) =421595373a(23) =421595373a(24) =25376945333a(25) =25376945333a(26) =127725535779a(27) =127725535779

External references