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Search: id:A076387
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| A076387 |
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Numbers n such that sum of digits in base 9 is a divisor of sum of prime divisors (A008472). |
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+0
8
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| 2, 3, 5, 7, 9, 21, 27, 65, 69, 70, 81, 84, 90, 110, 123, 126, 130, 133, 154, 189, 222, 228, 243, 252, 259, 264, 327, 329, 333, 340, 342, 343, 350, 365, 372, 381, 402, 434, 450, 516, 528, 580, 588, 618, 621, 650, 684, 729, 730, 731, 738, 740, 741, 756, 765, 774
(list; graph; listen)
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OFFSET
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1,1
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MAPLE
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A076387 := 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 9); t1 := floor(t1/9); 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: A039888 A036959 A108031 this_sequence A163975 A125975 A046758
Adjacent sequences: A076384 A076385 A076386 this_sequence A076388 A076389 A076390
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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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