A046545 Distinct numbers in writing first numerator and then denominator of the central elements of the 1/3-Pascal triangle (by row).

1, 3, 8, 10, 110, 406, 504, 1892, 7150, 27170, 311168, 1192516, 1528436, 17681020, 68346800, 88256520, 342551190, 1331805570, 5185791600, 20220038300, 78937755820, 308513659740, 1207002506320, 4726599121400, 18525219137100

Offset

1,2

Links

Table of n, a(n) for n=1..25.

Example

1/1; 1/1 1/1; 1/1 1/3 1/1; 1/1 4/3 4/3 1/1; 1/1 7/3 8/3 7/3 1/1; 1/1 10/3 5/1 5/1 10/3 1/1; 1/1 13/3 25/3 10/1 25/3 13/3 1/1; 1/1 16/3 38/3 55/3 55/3 38/3 16/3 1/1; ...

Crossrefs

Cf. A046534.

Sequence in context: A088072 A213033 A305176 * A279585 A372630 A350395

Adjacent sequences: A046542 A046543 A046544 * A046546 A046547 A046548

Keyword

tabf,nonn

Author

Mohammad K. Azarian

Extensions

More terms from James A. Sellers, Dec 14 1999

Status

approved