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

Author

Mohammad K. Azarian

Keywords

• nonn

Examples

			Triangle of the fractions begins as:
  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.

Extensions

More terms from James Sellers, Dec 15 1999