# Greetings from The On-Line Encyclopedia of Integer Sequences! http://oeis.org/ Search: id:a066911 Showing 1-1 of 1 %I A066911 #17 Sep 04 2017 23:28:25 %S A066911 0,0,2,3,5,5,10,15,14,10,17,23,28,32,33,39,41,53,58,70,67,64,77,95,95, %T A066911 85,97,91,100,119,129,158,146,141,148,155,160,176,181,190,197,226,238, %U A066911 268,273,256,281,323,321,321,308,313,328,376,365,372,359,350,381,430 %N A066911 Sum of primes < n that do not divide n. %C A066911 Equals row sums of triangle A143655. - _Gary W. Adamson_, Aug 28 2008 %H A066911 Michael De Vlieger, Table of n, a(n) for n = 1..10000 %F A066911 a(prime(n)) = A007504(n-1). - _Michel Marcus_, May 20 2014 %e A066911 a(8) = 3 + 5 + 7 = 15 because 3, 5 and 7 are the primes < 8 that do not divide 8. %t A066911 Table[Total@ Complement[Prime@ Range@ PrimePi@ n, FactorInteger[n][[All, 1]]], {n, 60}] (* _Michael De Vlieger_, Sep 04 2017 *) %o A066911 (PARI) a(n) = sum(i=1, n-1, if (isprime(i) && (n%i), i)); \\ _Michel Marcus_, May 20 2014 %Y A066911 Cf. A007504, A143655. %K A066911 nonn %O A066911 1,3 %A A066911 _Leroy Quet_, Jan 22 2002 # Content is available under The OEIS End-User License Agreement: http://oeis.org/LICENSE