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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A232971 G.f.: (1-5*x+3*x^2+x^3)/(1-7*x+10*x^2+x^3-x^4). 0
1, 2, 7, 29, 132, 629, 3061, 15034, 74131, 366145, 1809732, 8947577, 44243705, 218786578, 1081931151, 5350356149, 26458638660, 130843764557, 647051540301, 3199814854026, 15823803449275, 78252267828921, 386975076995972, 1913678872087345, 9463572870272049, 46799498561863842, 231434057435235031 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

REFERENCES

M. Dziemianczuk, Counting Lattice Paths With Four Types of Steps, Graphs and Combinatorics, September 2013, DOI 10.1007/s00373-013-1357-1.

LINKS

Table of n, a(n) for n=0..26.

CROSSREFS

Sequence in context: A200755 A132262 A007852 * A110576 A074600 A064641

Adjacent sequences:  A232968 A232969 A232970 * A232972 A232973 A232974

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Dec 05 2013

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 February 21 02:19 EST 2018. Contains 299388 sequences. (Running on oeis4.)