A046610 First numerator and then denominator of the central elements of the 1/5-Pascal triangle (by row).

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

Offset

1,4

Links

Table of n, a(n) for n=1..44.

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: A022834 A335102 A342069 * A009842 A169729 A070368

Adjacent sequences: A046607 A046608 A046609 * A046611 A046612 A046613

Keyword

nonn

Author

Mohammad K. Azarian

Extensions

More terms from James A. Sellers, Dec 15 1999

Status

approved