A110739 Arithmetic mean of row n in A112668.

1, 2, 7, 10, 311, 651, 42799, 410, 9709, 43584805, 6140565047, 5086263, 4696537119847, 23436764200591, 5124095576030431, 1345210, 7563707819165039903, 52981906467, 14523213296398891966759, 87169610

Offset

1,2

Links

Table of n, a(n) for n=1..20.

Formula

For n > 1, a(n) = (A110738(n)^n-1)/(n*A110738(n)-n). - David Wasserman, Dec 12 2008

Maple

A110737 := proc(n) local i, a ; if n = 1 then RETURN(1) ; else a := 2 ; while (1-a^n)/(1-a) mod n <> 0 do a := a+1 ; od ; RETURN( (1-a^n)/(1-a) ) ; fi ; end: A110739 := proc(n) A110737(n)/n ; end: for n from 1 to 25 do printf("%d, ", A110739(n)) : od : # R. J. Mathar, Mar 13 2007

Crossrefs

Equals A110737(n)/n.

Cf. A110737, A110738.

Sequence in context: A351240 A151346 A247166 * A179117 A133154 A100020

Adjacent sequences: A110736 A110737 A110738 * A110740 A110741 A110742

Keyword

easy,nonn

Author

Amarnath Murthy, Aug 10 2005

Extensions

More terms from R. J. Mathar, Mar 13 2007

Status

approved