|
|
|
|
10, 99, 1090, 11880, 129601, 1413720, 15421330, 168220899, 1835008570, 20016873360, 218350598401, 2381839709040, 25981886201050, 283418908502499, 3091626107326450, 33724468272088440, 367877524885646401, 4012928305470021960, 43774333835284595170, 477504743882660524899, 5208777848873981178730
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,1
|
|
COMMENTS
|
1/3 = 3/10 + 3/99 + 3/1090, + 3/11880 + ..., = 3/(1*10) + 3/(3*33) + 3/(10*109) + 3/(33*360) + ...
Odd n terms == 1 mod 9; even n terms == 0 mod 9
|
|
LINKS
|
|
|
FORMULA
|
Empirical g.f.: -x*(x-10) / ((x+1)*(x^2-11*x+1)). - Colin Barker, Oct 20 2013
|
|
EXAMPLE
|
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|