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A156672
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a(1)=2, a(n+1) is the smallest prime >= a(n) + sum of digits of a(n).
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2
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2, 5, 11, 13, 17, 29, 41, 47, 59, 73, 83, 97, 113, 127, 137, 149, 163, 173, 191, 211, 223, 233, 241, 251, 263, 277, 293, 307, 317, 331, 347, 367, 383, 397, 419, 433, 443, 457, 479, 499, 521, 541, 557, 577, 599, 631, 641, 653, 673, 691, 709, 727, 743, 757, 787
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OFFSET
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1,1
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COMMENTS
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Heuristically, a(n) ~ kn log n for some k >= 4.5/log 10.
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LINKS
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EXAMPLE
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2, 5(>4=2+2), 11(>10>5+5), 13(=13=11+1+1), 17(=17=13+1+3), 29(>25=17+1+7), etc.
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CROSSREFS
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KEYWORD
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nonn,base,less
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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