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.

A143467 Triangle read by rows, A143315 * A128407, 1<=k<=n.

This page as a plain text file.
%I A143467 #6 Aug 14 2023 06:54:34
%S A143467 1,3,-1,5,0,-1,7,-3,0,0,9,0,0,0,-1,11,-5,-3,0,0,1,13,0,0,0,0,0,-1,15,
%T A143467 -7,0,0,0,0,0,0,17,0,-5,0,0,0,0,0,0,19,-9,0,0,-3,0,0,0,0,1,21,0,0,0,0,
%U A143467 0,0,0,0,0,-1,23,-11,-7,0,0,3,0,0,0,0,0,0,25,0,0,0,0,0,0,0,0,0,0,0,-1
%N A143467 Triangle read by rows, A143315 * A128407, 1<=k<=n.
%C A143467 Row sums = A140434: (1, 2, 4, 4, 8, 4, 12, 8, 12,...).
%C A143467 Right border = mu(n), A008683: (1, -1, -1, 0, -1, 1,...).
%e A143467 First few rows of the triangle =
%e A143467 1;
%e A143467 3, -1;
%e A143467 5, 0, -1;
%e A143467 7, -3, 0, 0;
%e A143467 9, 0, 0, 0, -1;
%e A143467 11, -5, -3, 0, 0, 1;
%e A143467 13, 0, 0, 0, 0, 0, -1;
%e A143467 ...
%Y A143467 Cf. A008683, A128407, A143315, A143467.
%K A143467 tabl,sign
%O A143467 1,2
%A A143467 _Gary W. Adamson_, Aug 17 2008
%E A143467 a(66) corrected by _Georg Fischer_, Aug 14 2023