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A151941 2^(2^n)*( (2^(n-1))! )^2*binomial(2*n,n). 0
8, 384, 2949120, 7457942274048000, 473804945588441678165307763458048000000, 1180144503132859774172436967820251490293315957318932076130423256619673861908070400000000000000 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

The number of most-perfect magic squares of order 2^m where m>=2.

The next term is too large to include here.

LINKS

Table of n, a(n) for n=1..6.

MAPLE

f:=m->2^(2^m)*( (2^(m-1))! )^2*binomial(2*m, m);

CROSSREFS

A subsequence of A151932. Cf. A051235.

Sequence in context: A067624 A096204 A153836 * A085806 A042115 A159515

Adjacent sequences:  A151938 A151939 A151940 * A151942 A151943 A151944

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Aug 12 2009, based on email from Reinhardt Wiewe.

STATUS

approved

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Last modified October 14 14:45 EDT 2019. Contains 328019 sequences. (Running on oeis4.)