A046531 Numerators of elements to right of central elements of 1/2-Pascal triangle (by row).

1, 1, 3, 1, 5, 1, 11, 7, 1, 9, 9, 1, 20, 27, 11, 1, 67, 19, 13, 1, 147, 105, 51, 15, 1, 126, 78, 33, 17, 1, 273, 204, 111, 83, 19, 1, 477, 315, 305, 51, 21, 1, 1023, 792, 935, 407, 123, 23, 1, 1815, 2519, 671, 265, 73, 25, 1, 3861, 6149, 3861, 936, 338, 171

Offset: 1

Author

Mohammad K. Azarian

Keywords

• tabf
• nonn
• less

Examples

			1/1;
1/1 1/1;                               -->  1
1/1 1/2 1/1;                           -->  1
1/1 3/2 3/2 1/1;                       -->  3  1
1/1 5/2 3/1 5/2 1/1;                   -->  5  1
1/1 7/2 11/2 11/2 7/2 1/1;             --> 11  7 1
1/1 9/2 9/1 11/1 9/1 9/2 1/1;          -->  9  9 1
1/1 11/2 27/2 20/1 20/1 27/2 11/2 1/1; --> 20 27 11 1
		

Links

• Thomas M. Richardson, The three 'R's and Dual Riordan Arrays, arXiv:1609.01193 [math.CO], 2016.

Crossrefs

Cf. A046213, A046226.

Extensions

More terms from Sean A. Irvine, Apr 13 2021