A046230 First denominator and then numerator of elements to right of central elements of 1/2-Pascal triangle (by row), excluding 2's.

1, 1, 1, 1, 3, 1, 1, 5, 1, 1, 11, 7, 1, 1, 1, 9, 9, 1, 1, 1, 20, 27, 11, 1, 1, 67, 1, 19, 13, 1, 1, 147, 105, 51, 15, 1, 1, 1, 126, 1, 78, 1, 33, 17, 1, 1, 1, 273, 1, 204, 1, 111, 83, 19, 1, 1, 1, 477, 1, 315, 305, 1, 51, 21, 1, 1, 1, 1023, 1, 792, 935, 407, 123, 23, 1, 1, 1, 1815

Offset

1,5

Links

Table of n, a(n) for n=1..78.

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: A101443 A228037 A184726 * A046229 A255670 A182469

Adjacent sequences: A046227 A046228 A046229 * A046231 A046232 A046233

Keyword

tabf,nonn

Author

Mohammad K. Azarian

Extensions

More terms from James A. Sellers, Dec 13 1999

Status

approved