a(n) = numerator(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.

A392570

a(n) = numerator(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) =0a(1) =1a(2) =2a(3) =11a(4) =44a(5) =159a(6) =106a(7) =337a(8) =2696a(9) =8105a(10) =16210a(11) =47263a(12) =567156a(13) =1621963a(14) =3243926a(15) =9153731a(16) =146459696a(17) =409237587a(18) =90941686a(19) =252200785a(20) =1008803140a(21) =2780981401a(22) =5561962802a(23) =15258656381a(24) =366207753144

External references