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A249153
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Exponent of 2 in the hyperfactorial of 2n: a(n) = A007814(A002109(2n)).
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4
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0, 2, 10, 16, 40, 50, 74, 88, 152, 170, 210, 232, 304, 330, 386, 416, 576, 610, 682, 720, 840, 882, 970, 1016, 1208, 1258, 1362, 1416, 1584, 1642, 1762, 1824, 2208, 2274, 2410, 2480, 2696, 2770, 2922, 3000, 3320, 3402, 3570, 3656, 3920, 4010, 4194, 4288, 4768, 4866, 5066, 5168, 5480, 5586, 5802, 5912
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OFFSET
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0,2
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LINKS
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FORMULA
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PROG
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(Scheme, two alternative versions)
(Python)
from sympy import multiplicity
for i in range(2, 20002, 2):
n += multiplicity(2, i)*i
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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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