A116420 Reduced denominators of 2(2^(1+n)-1)/(1+n)/(2+n).

1, 1, 6, 2, 15, 1, 28, 12, 45, 5, 66, 2, 91, 35, 120, 8, 153, 1, 190, 14, 33, 11, 276, 20, 325, 117, 54, 14, 435, 5, 496, 176, 561, 595, 630, 2, 703, 247, 780, 4, 861, 1, 946, 66, 1035, 23, 1128, 56, 1225, 425, 1326, 26, 1431, 55, 1540, 532, 1653, 29, 1770, 2, 1891

Offset

0,3

Links

Table of n, a(n) for n=0..60.

Eric Weisstein's World of Mathematics, Absolute Value

Eric Weisstein's World of Mathematics, Unit Square Integral

Example

1, 1, 7/6, 3/2, 31/15, 3, 127/28, 85/12, 511/45, 93/5, 2047/66, ...

Mathematica

Denominator[Table[(2^(n+2)-2)/((n+1)(n+2)), {n, 0, 60}]] (* Harvey P. Dale, Apr 06 2013 *)

Crossrefs

Cf. A116419.

Sequence in context: A142867 A080977 A095951 * A069268 A348060 A082155

Adjacent sequences: A116417 A116418 A116419 * A116421 A116422 A116423

Keyword

nonn,frac,changed

Author

Eric W. Weisstein, Feb 14 2006

Status

approved