-47321

Appears in sequences

• a(n) = -2*a(n-1) + a(n-2) for n>1, a(0)=1, a(1)=-1.at n=13A123335
• List of triples (r,s,t): the matrix M = [[1,4,4][1,3,2][1,2,1]] is raised to successive negative powers, then (r,s,t) are the square roots of M[3,1], M[1,1], M[1,3] respectively.at n=37A249577