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Search: id:A076381
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| A076381 |
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Numbers n such that sum of digits in base 3 is a divisor of sum of prime divisors (A008472). |
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+0
3
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| 2, 3, 4, 9, 25, 27, 30, 42, 51, 66, 78, 81, 84, 90, 105, 114, 126, 138, 141, 147, 153, 156, 159, 168, 170, 185, 186, 187, 198, 201, 220, 222, 228, 231, 234, 243, 245, 246, 252, 258, 264, 270, 276, 282, 290, 291, 294, 301, 312, 315, 322, 323, 325, 336, 340, 341
(list; graph; listen)
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OFFSET
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1,1
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MAPLE
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A076381 := proc(n) local i, j, t, t1, sod, sopd; t := NULL; for i from 2 to n do t1 := i; sod := 0; while t1 <> 0 do sod := sod + (t1 mod 3); t1 := floor(t1/3); od; sopd := 0; j := 1; while ithprime(j) <= i do if i mod ithprime(j) = 0 then sopd := sopd+ithprime(j); fi; j := j+1; od; if sopd mod sod = 0 then t := t, i; fi; od; t; end;
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CROSSREFS
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Cf. A075657, A076380 - A076387.
Sequence in context: A088220 A085612 A073915 this_sequence A063455 A001144 A121253
Adjacent sequences: A076378 A076379 A076380 this_sequence A076382 A076383 A076384
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KEYWORD
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nonn,base
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AUTHOR
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Floor van Lamoen (fvlamoen(AT)hotmail.com), Oct 08 2002
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