A046581 - OEIS

A046581

First numerator and then denominator of each element of the 1/4-Pascal triangle (by row), excluding 4's.

1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 5, 5, 1, 1, 1, 1, 9, 5, 2, 9, 1, 1, 1, 1, 13, 19, 19, 13, 1, 1, 1, 1, 17, 8, 1, 19, 2, 8, 1, 17, 1, 1, 1, 1, 21, 49, 35, 2, 35, 2, 49, 21, 1, 1, 1, 1, 25, 35, 2, 119, 35, 1, 119, 35, 2, 25, 1, 1, 1, 1, 29

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,14

LINKS

Table of n, a(n) for n=1..74.

EXAMPLE

1/1; --> 1 1

1/1 1/1; --> 1 1 1 1

1/1 1/4 1/1; --> 1 1 1 1 1

1/1 5/4 5/4 1/1; --> 1 1 5 5 1 1

1/1 9/4 5/2 9/4 1/1; --> ...

1/1 13/4 19/4 19/4 13/4 1/1;

1/1 17/4 8/1 19/2 8/1 17/4 1/1;

1/1 21/4 49/4 35/2 35/2 49/4 21/4 1/1; ...

CROSSREFS

Cf. A046563.

Sequence in context: A172457 A028277 A046582 * A046594 A046585 A046584

Adjacent sequences: A046578 A046579 A046580 * A046582 A046583 A046584

KEYWORD

tabf,nonn,frac,less

AUTHOR

Mohammad K. Azarian

STATUS

approved