This site is supported by donations to The OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A152150 Riordan array [exp(x^2/2+x^4/4),x]. 0
 1, 0, 1, 1, 0, 1, 0, 3, 0, 1, 9, 0, 6, 0, 1, 0, 45, 0, 10, 0, 1, 105, 0, 135, 0, 15, 0, 1, 0, 735, 0, 315, 0, 21, 0, 1, 2625, 0, 2940, 0, 630, 0, 28, 0, 1, 0, 23625, 0, 8820, 0, 1134, 0, 36, 0, 1, 76545, 0, 118125, 0 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 0,8 COMMENTS Row sums are A001472. LINKS EXAMPLE Triangle begins 1, 0, 1, 1, 0, 1, 0, 3, 0, 1, 9, 0, 6, 0, 1, 0, 45, 0, 10, 0, 1, 105, 0, 135, 0, 15, 0, 1, 0, 735, 0, 315, 0, 21, 0, 1 with production matrix which begins 0, 1, 1, 0, 1, 0, 2, 0, 1, 6, 0, 3, 0, 1, 0, 24, 0, 4, 0, 1; 120, 0, 60, 0, 5, 1 with e.g.f. exp(x*t)(t+1/(1-x^2)). CROSSREFS Sequence in context: A174860 A157391 A099097 * A136239 A225443 A222060 Adjacent sequences:  A152147 A152148 A152149 * A152151 A152152 A152153 KEYWORD easy,nonn,tabl AUTHOR Paul Barry, Nov 26 2008 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 April 24 04:00 EDT 2019. Contains 322406 sequences. (Running on oeis4.)