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

 

Logo

Please make a donation to keep the OEIS running. We are now in our 56th year. In the past year we added 10000 new sequences and reached almost 9000 citations (which often say "discovered thanks to the OEIS").
Other ways to donate

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A049180 Revert transform of 2*(1 + x + x^2 + x^4 + x^5 + x^6)-1/(1-x). 0
1, 1, 3, 11, 43, 183, 815, 3749, 17693, 85161, 416451, 2063255, 10334187, 52241811, 266203487, 1365869249, 7050739841, 36591914977, 190811893315, 999264296139, 5253232501219, 27713207861343, 146664411527631, 778434156770069 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

Sign diagram of generating sequence: +++-+++---------...

LINKS

Table of n, a(n) for n=1..24.

Index entries for reversions of series

CROSSREFS

Sequence in context: A151103 A049189 A049163 * A049152 A151104 A138787

Adjacent sequences:  A049177 A049178 A049179 * A049181 A049182 A049183

KEYWORD

nonn

AUTHOR

Olivier Gérard

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 December 3 20:56 EST 2020. Contains 338920 sequences. (Running on oeis4.)