1,1
Table of n, a(n) for n=1..9.
Eric Weisstein's World of Mathematics, Nonsingular Matrix.
a(n) = 2^(2*n-1) * A055165(n-1).
Cf. A055165, A056989.
Sequence in context: A009505 A305737 A028368 * A234637 A234632 A070235
Adjacent sequences: A056987 A056988 A056989 * A056991 A056992 A056993
nonn,nice
Eric W. Weisstein
a(5) from Winston C. Yang (winston(AT)cs.wisc.edu), Aug 26 2000
a(6)-a(8) computed from A055165 by David desJardins (david(AT)desjardins.org), Apr 22 2001
a(9) from Max Alekseyev, computed from A055165, Jan 15 2007
approved