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A134228
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Sum of the odd primes <= 2*10^n.
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2
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75, 4225, 277048, 21171189, 1709600811, 142913828920, 12272577818050, 1075207199997332, 95673602693282038, 8617752113620426557, 783964147695858014234, 71904055278788602481892, 6640510710493148698166594, 616876923984020487671442310
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OFFSET
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1,1
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LINKS
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FORMULA
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Beginning with 3, compute 10^n sums of odds, less odd composites, for each 10^n.
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EXAMPLE
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a(1)=75 because that is the sum of odds (3+5+7+11+13+17+19=75) less composites (9,15,21) under 10^1 (beginning with 3).
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PROG
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(PARI) a(n) = sum(i=3, 2*10^n, i*isprime(i)); \\ Michel Marcus, Jun 08 2014
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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