1,2

Herman Jamke (hermanjamke(AT)fastmail.fm), May 13 2007, Table of n, a(n) for n = 1..22

(PARI) permRWNb(a)=n=matsize(a)[1]; if(n==1, return(a[1, 1])); sg=1; in=vectorv(n); x=in; x=a[, n]-sum(j=1, n, a[, j])/2; p=prod(i=1, n, x[i]); for(k=1, 2^(n-1)-1, sg=-sg; j=valuation(k, 2)+1; z=1-2*in[j]; in[j]+=z; x+=z*a[, j]; p+=prod(i=1, n, x[i], sg)); return(2*(2*(n%2)-1)*p) for(n=1, 22, a=matrix(n, n, i, j, 1+(j-i)%n); print1(permRWNb(a)", ")) - Herman Jamke (hermanjamke(AT)fastmail.fm), May 13 2007

Cf. A052182, A070896.

Sequence in context: A110430 A110432 A132619 this_sequence A129420 A015221 A035305

Adjacent sequences: A085716 A085717 A085718 this_sequence A085720 A085721 A085722

nonn

Yuval Dekel (dekelyuval(AT)hotmail.com), Jul 19 2003

More terms from Vladeta Jovovic (vladeta(AT)eunet.rs), Jul 21 2003