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A202727 Position of records in A067513. 4

%I #9 Mar 30 2012 17:28:27

%S 1,2,4,12,36,60,120,180,360,540,720,1080,1260,1680,2160,2520,3780,

%T 5040,7560,10080,15120,25200,30240,45360,55440,60480,75600,85680,

%U 100800,110880,131040,166320,196560,257040,332640,393120,514080,655200,665280,786240,831600

%N Position of records in A067513.

%C Numbers n such that n has more divisors d such that d+1 is prime than any smaller number.

%H Donovan Johnson, <a href="/A202727/b202727.txt">Table of n, a(n) for n = 1..100</a>

%o (PARI) r=0;for(n=1,1e8,t=sumdiv(n,d,isprime(d+1));if(t>r,r=t;print1(n", ")))

%Y Cf. A067513, A202728.

%K nonn

%O 1,2

%A _Charles R Greathouse IV_, Dec 23 2011

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Last modified August 2 02:01 EDT 2024. Contains 374819 sequences. (Running on oeis4.)