A076385 - OEIS

A076385

Numbers n such that sum of digits in base 7 is a divisor of sum of prime divisors (A008472).

2, 3, 5, 7, 8, 9, 42, 49, 78, 84, 105, 114, 115, 126, 130, 154, 156, 161, 168, 170, 186, 228, 235, 252, 258, 294, 305, 336, 343, 350, 357, 366, 371, 372, 378, 402, 410, 425, 429, 430, 434, 442, 444, 455, 456, 460, 474, 504, 516, 520, 555, 558, 574, 588, 616

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OFFSET

1,1

LINKS

Table of n, a(n) for n=1..55.

MAPLE

A076385 := 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 7); t1 := floor(t1/7); 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;

CROSSREFS

Cf. A075657, A076380 - A076387.

Sequence in context: A182758 A274768 A272667 * A152604 A302293 A266347

Adjacent sequences: A076382 A076383 A076384 * A076386 A076387 A076388

KEYWORD

nonn,base

AUTHOR

Floor van Lamoen, Oct 08 2002

STATUS

approved