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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
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
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Aug 12 2009, based on email from Reinhardt Wiewe.
STATUS
approved

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Last modified March 18 21:02 EDT 2024. Contains 370951 sequences. (Running on oeis4.)