login
This site is supported by donations to The OEIS Foundation.
Logo

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A111927 Expansion of x^3/((x-1)*(2*x-1)*(x^2-x+1)). 3
0, 0, 0, 1, 4, 10, 21, 42, 84, 169, 340, 682, 1365, 2730, 5460, 10921, 21844, 43690, 87381, 174762, 349524, 699049, 1398100, 2796202, 5592405, 11184810, 22369620, 44739241, 89478484, 178956970, 357913941, 715827882, 1431655764, 2863311529 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,5

COMMENTS

Binomial transform of sequence (0, 0, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 1, 0). Note: the binomial transform of the sequence (0, 0, 0, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 1, 0) is A111926; the binomial transform of the sequence (0, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 1, 0) is A024495 (disregarding first two terms, which are both zero).

The sequence relates the calculation of the logarithm of the Twin Prime Constants of order 3 to the sequence of prime zeta functions, see definition 7 in arXiv:0903.2514. [From R. J. Mathar, Mar 28 2009]

LINKS

Table of n, a(n) for n=0..33.

Index to sequences with linear recurrences with constant coefficients, signature (4,-6,5,-2).

FORMULA

a(n+2) - a(n+1) + a(n) = A000225(n);

MAPLE

seq(sum(binomial(n, k*3), k=1..n), n=0..33); - Zerinvary Lajos (zerinvarylajos(AT)yahoo.com)), Oct 23 2007

CROSSREFS

Cf. A000295, A111926, A024495.

Sequence in context: A121497 A132925 A053643 * A109885 A054211 A112770

Adjacent sequences:  A111924 A111925 A111926 * A111928 A111929 A111930

KEYWORD

easy,nonn

AUTHOR

Creighton Dement (creighton.k.dement(AT)uni-oldenburg.de), Aug 21 2005

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Transforms | Puzzles | Hot | Classics
Recent Additions | More pages | Superseeker | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement .

Last modified May 20 00:59 EDT 2013. Contains 225445 sequences.