login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A177737 Partial sums of A046878. 0
0, 1, 2, 7, 9, 17, 30, 181, 213, 296, 369, 1802, 2449, 17790, 46001, 56448, 57664, 77009, 95190, 746935, 2289093, 3753007, 6539606, 128829523, 158059067, 298060788, 432415361, 1207300530, 1953285227, 43665199740, 124195273633 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

COMMENTS

Partial sums of numerator of 1/n Sum[1/BinomialCoefficient[n-1,k], {k=0...n-1}]. The subsequence of primes in the partial sum of numerators begins: 2, 7, 17, 181, x, 3753007, 158059067.

LINKS

Table of n, a(n) for n=0..30.

FORMULA

a(n) = SUM[i=0..n] A046878(i) = SUM[i=0..n] numerator of SUM[k=0..i-1] (1/i) * (1/BinomialCoefficient[i-1,k] = SUM[i=0..n] numerator of (1/2^i)*SUM[k=1..i]((2^k)/k).

CROSSREFS

Cf. A046878, A046825, A046879.

Sequence in context: A199537 A079326 A055673 * A336770 A293645 A293646

Adjacent sequences:  A177734 A177735 A177736 * A177738 A177739 A177740

KEYWORD

nonn

AUTHOR

Jonathan Vos Post, May 12 2010

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified October 23 14:24 EDT 2021. Contains 348214 sequences. (Running on oeis4.)