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A046217 First numerator and then denominator of 1/2-Pascal triangle (by row) excluding 1's and 2's. 0
3, 3, 5, 3, 5, 7, 11, 11, 7, 9, 9, 11, 9, 9, 11, 27, 20, 20, 27, 11, 13, 19, 67, 40, 67, 19, 13, 15, 51, 105, 147, 147, 105, 51, 15, 17, 33, 78, 126, 147, 126, 78, 33, 17, 19, 83, 111, 204, 273, 273, 204, 111, 83, 19, 21, 51, 305, 315, 477, 546, 477, 315, 305, 51, 21, 23 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..66.

EXAMPLE

1/1; 1/1 1/1; 1/1 1/2 1/1; 1/1 3/2 3/2 1/1; 1/1 5/2 3/1 5/2 1/1; 1/1 7/2 11/2 11/2 7/2 1/1; 1/1 9/2 9/1 11/1 9/1 9/2 1/1; 1/1 11/2 27/2 20/1 20/1 27/2 11/2 1/1; ...

CROSSREFS

Cf. A046213.

Sequence in context: A335074 A239931 A033558 * A057662 A015971 A163167

Adjacent sequences:  A046214 A046215 A046216 * A046218 A046219 A046220

KEYWORD

tabf,nonn,easy

AUTHOR

Mohammad K. Azarian

EXTENSIONS

More terms from James A. Sellers, Dec 13 1999

STATUS

approved

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Last modified July 25 02:57 EDT 2021. Contains 346282 sequences. (Running on oeis4.)