A046611 First denominator and then numerator of the central elements of the 1/5-Pascal triangle (by row).

1, 1, 5, 1, 5, 12, 5, 46, 1, 34, 1, 126, 5, 2352, 5, 8844, 5, 33462, 1, 25454, 1, 97240, 5, 1864356, 5, 7171892, 5, 27665596, 1, 21395520, 1, 82907640, 1, 321868854, 1, 1251661518, 1, 4874644104, 1, 19010020260, 1, 74225053980, 1, 290134122564, 1

Offset

1,3

Links

Table of n, a(n) for n=1..45.

Example

1/1; 1/1 1/1; 1/1 1/5 1/1; 1/1 6/5 6/5 1/1; 1/1 11/5 12/5 11/5 1/1; 1/1 16/5 23/5 23/5 16/5 1/1; 1/1 21/5 39/5 46/5 39/5 21/5 1/1; 1/1 26/5 12/1 17/1 17/1 12/1 26/5 1/1; ...

Crossrefs

Cf. A046601.

Sequence in context: A131113 A139426 A143384 * A145825 A101692 A281105

Adjacent sequences: A046608 A046609 A046610 * A046612 A046613 A046614

Keyword

nonn

Author

Mohammad K. Azarian

Extensions

More terms from James A. Sellers, Dec 15 1999

Status

approved