The OEIS is supported by the many generous donors to the OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A174302 Riordan array ((1-x^2c(x)^2)/(1-xc(x)-x^2c(x)^2),xc(x)), c(x) the g.f. of A000108. 0
 1, 1, 1, 2, 2, 1, 6, 5, 3, 1, 19, 15, 9, 4, 1, 63, 48, 29, 14, 5, 1, 215, 160, 97, 49, 20, 6, 1, 749, 548, 333, 173, 76, 27, 7, 1, 2650, 1914, 1165, 617, 284, 111, 35, 8, 1, 9490, 6785, 4135, 2221, 1056, 439, 155, 44, 9, 1 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 0,4 COMMENTS First row is essentially A109262. LINKS EXAMPLE Triangle begins 1, 1, 1, 2, 2, 1, 6, 5, 3, 1, 19, 15, 9, 4, 1, 63, 48, 29, 14, 5, 1, 215, 160, 97, 49, 20, 6, 1, 749, 548, 333, 173, 76, 27, 7, 1, Production matrix begins 1, 1, 1, 1, 1, 2, 1, 1, 1, 2, 1, 1, 1, 1, 3, 1, 1, 1, 1, 1, 3, 1, 1, 1, 1, 1, 1, 4, 1, 1, 1, 1, 1, 1, 1 CROSSREFS Sequence in context: A130469 A106381 A064784 * A108074 A189175 A271776 Adjacent sequences:  A174299 A174300 A174301 * A174303 A174304 A174305 KEYWORD easy,nonn,tabl AUTHOR Paul Barry, Mar 15 2010 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.

Last modified January 18 17:18 EST 2022. Contains 350455 sequences. (Running on oeis4.)