cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

Showing 1-2 of 2 results.

A166092 Integers (all of the form 4k+3) organized into an array based on the number of times Sum_{i=1..u} J(i,4k+3) obtains value zero when u ranges from 1 to (4k+3), where J(i,k) is the Jacobi symbol.

Original entry on oeis.org

3, 7, 11, 15, 319, 19, 23, 607, 35, 415, 31, 703, 59, 1639, 91, 39, 895, 63, 2359, 175, 43, 47, 1063, 103, 3995, 575, 127, 51, 55, 1103, 131, 5191, 631, 295, 83, 67, 71, 1135, 251, 5459, 731, 635, 223, 115, 27, 79, 1447, 279, 7567, 1175, 659, 735, 139
Offset: 0

Views

Author

Antti Karttunen, Oct 08 2009

Keywords

Comments

Note: these are all of the form 4k+3, but still this is not permutation of A004767 (for the reason explained in A166091). Sequence A165603 gives the 4k+3 integers missing from this table.This square array A(row>=0, col>=0) is listed antidiagonally as A(0,0), A(0,1), A(1,0), A(0,2), A(1,1), A(2,0), ...

Examples

			The top left corner of the array:
3, 7, 15, 23, 31, 39, ...
11, 319, 607, 703, 895, 1063, ...
19, 35, 59, 63, 103, 131, ...
415, 1639, 2359, 3995, 5191, 5459, ...
91, 175, 575, 631, 731, 1175, ...
		

Crossrefs

a(n) = A004767(A166091(n)). The leftmost column: A166096. The first five rows: A165469, A166053, A166055, A166057, A166059. Cf. also A112070.

A166052 Second row of A166091. Positions of 3's in A166086.

Original entry on oeis.org

2, 79, 151, 175, 223, 265, 275, 283, 361, 373, 571, 595, 635, 805, 991, 1063, 1153, 1201, 1285, 1301, 1351, 1423, 1445, 1495, 1561, 1621, 1651, 1699, 1735, 1873, 1981, 2125, 2275, 2281, 2413, 2545, 2653, 2683, 3013, 3301, 3331, 3385, 3535
Offset: 1

Views

Author

Antti Karttunen, Oct 08 2009

Keywords

Crossrefs

See A166053.
Showing 1-2 of 2 results.