|
|
A129195
|
|
a(n)=denominator(n!/4^n).
|
|
0
|
|
|
1, 4, 8, 32, 32, 128, 256, 1024, 512, 2048, 4096, 16384, 16384, 65536, 131072, 524288, 131072, 524288, 1048576, 4194304, 4194304, 16777216, 33554432, 134217728, 67108864, 268435456, 536870912, 2147483648
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
0,2
|
|
LINKS
|
|
|
FORMULA
|
a(n)=denominator((1/(2*pi))*int(exp(i*4*t)(-((pi-t)/i)^n),t,0,2*pi)), i=sqrt(-1); a(n)=2^A092391(n);
|
|
MATHEMATICA
|
Table[Denominator[n!/4^n], {n, 0, 30}] (* Harvey P. Dale, Mar 05 2013 *)
|
|
CROSSREFS
|
|
|
KEYWORD
|
easy,nonn
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|