A046229 First numerator and then denominator 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, 9, 1, 9, 1, 1, 20, 1, 27, 11, 1, 1, 67, 19, 1, 13, 1, 1, 147, 105, 51, 15, 1, 1, 126, 1, 78, 1, 33, 1, 17, 1, 1, 273, 1, 204, 1, 111, 1, 83, 19, 1, 1, 477, 1, 315, 1, 305, 51, 1, 21, 1, 1, 1023, 1, 792, 1, 935, 407, 123, 23, 1, 1, 1815, 1

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: A228037 A184726 A046230 * A255670 A182469 A379634

Adjacent sequences: A046226 A046227 A046228 * A046230 A046231 A046232

Keyword

nonn,tabf

Author

Mohammad K. Azarian

Extensions

More terms from James A. Sellers, Dec 13 1999

Status

approved