A046578 First denominator and then numerator of the elements to the right of the central elements of the 1/4-Pascal triangle (by row), excluding 1's and 4's.

5, 9, 19, 13, 8, 17, 2, 35, 49, 21, 119, 2, 35, 25, 259, 189, 95, 29, 112, 71, 31, 33, 2, 483, 183, 102, 157, 37, 2, 849, 285, 565, 2, 97, 41, 2, 1815, 2, 1419, 1705, 759, 235, 45, 1617, 4543, 616, 2, 497, 70, 49, 3432, 11011, 7007, 2, 1729, 2, 637, 329, 53, 24739, 2, 9009

Offset

1,1

Links

Table of n, a(n) for n=1..62.

Example

1/1; -->
1/1 1/1; -->
1/1 1/4 1/1; -->
1/1 5/4 5/4 1/1; --> 5
1/1 9/4 5/2 9/4 1/1; --> 9
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: A036832 A257595 A116453 * A046590 A372997 A344746

Adjacent sequences: A046575 A046576 A046577 * A046579 A046580 A046581

Keyword

tabf,nonn,frac,less

Author

Mohammad K. Azarian

Extensions

More terms from David W. Wilson

Status

approved