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Search: id:A089285
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| A089285 |
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Sum of divisors of floor(pi*10^n), pi=3.14... |
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+0
4
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| 4, 32, 474, 4550, 38688, 314160, 5890500, 47154384, 627314688, 4227938208, 44474529792, 471238898040, 3384209127992, 31609375538016, 321468276096000, 3397292023738536, 63981878014882800, 314159266666564480
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OFFSET
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0,1
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COMMENT
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a(n)=A000203(A011545(n)).
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EXAMPLE
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n=4: floor(pi*10^4)=31415 with divisors:
{1,5,61,103,305,515,6283,31415}: a(4)=1+5+61+103+305+515+6283+31415=38688.
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CROSSREFS
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Cf. A089284, A089286, A089287, A000796.
Adjacent sequences: A089282 A089283 A089284 this_sequence A089286 A089287 A089288
Sequence in context: A009668 A005121 A037964 this_sequence A086906 A034663 A093581
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KEYWORD
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nonn
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AUTHOR
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Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Oct 30 2003
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