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

 

Logo

Annual Appeal: Please make a donation (tax deductible in USA) to keep the OEIS running. Over 5000 articles have referenced us, often saying "we discovered this result with the help of the OEIS".

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A027167 Sum{T(n-k,k)}, 0<=k<=[ n/2 ], T given by A027157. 0
1, 2, 4, 7, 15, 24, 50, 81, 165, 266, 544, 875, 1787, 2876, 5870, 9445, 19281, 31022, 63324, 101887, 207975, 334624, 683050, 1099001, 2243325, 3609426, 7367704, 11854355, 24197587, 38932996, 79471590, 127866765, 261006761 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..32.

FORMULA

Empirical g.f.: (1+x)^2*(1-x+x^2) / ((1-x)*(1-2*x^2-3*x^4-4*x^6)). - Colin Barker, Feb 20 2016

CROSSREFS

Sequence in context: A019998 A002956 A171276 * A232464 A264292 A259592

Adjacent sequences:  A027164 A027165 A027166 * A027168 A027169 A027170

KEYWORD

nonn

AUTHOR

Clark Kimberling

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 | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy .

Last modified December 5 21:40 EST 2016. Contains 278771 sequences.