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1, 2, 28, 968, 62512, 6487712, 987533248, 207257057408, 57359688424192, 20240182500956672, 8869195638810631168, 4725115451770644482048, 3007722163880719988764672, 2254432760608214922012434432, 1965374406868398554356767244288, 1971745067277979562424894483365888
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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0,2
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LINKS
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PROG
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(SageMath)
@cached_function
def f(n) :
if n == 0 : return 1
if n % 2 != 0 : return 0
return sum(f(k) * binomial(n, k) for k in range(n)[::2])
return 2^n * f(2 * n)
print([A362587(n) for n in range(16)])
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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