cp's OEIS Frontend

A071543 a(n) = det M_n where M_n is the n X n matrix m(i,j) = prime(i+j); a(0) = 1 by convention.

%I A071543 #9 Mar 30 2012 18:39:00
%S A071543 1,3,-4,12,144,576,-7104,45248,450432,2240512,5292544,-88076288,
%T A071543 -62210048,391122944,-1489174528,-165174853632,2565388042240,
%U A071543 -28667557511168,-1065163492556800,-14206520416796672,-115544734381899776,5968167755906547712,-258278630548029046784
%N A071543 a(n) = det M_n where M_n is the n X n matrix m(i,j) = prime(i+j); a(0) = 1 by convention.
%C A071543 a(n) is a square for n=2,4 and 5. Are there any other values?
%o A071543 (PARI) for(n=1,30,print1(matdet(matrix(n,n,i,j, prime(i+j))),","))
%K A071543 easy,sign
%O A071543 0,2
%A A071543 _Benoit Cloitre_, May 30 2002
%E A071543 Edited by _N. J. A. Sloane_, Sep 18 2008 at the suggestion of R. J. Mathar.