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A234521 Sequence of numbers from A234519 such that A234519(n) > A234519(k) for all k < n. 9

%I #6 Jan 18 2014 13:37:04

%S 2,4,6,8,10,12,14,16,18,20,24,28,30,32,36,40,42,44,48,50,54,56,60,64,

%T 66,72,78,80,84,90,96,100,102,108,112,120,126,132,144,150,156,160,168,

%U 180,192,200,204,210,216,220,224,228,240,252,264,276,280,288,300

%N Sequence of numbers from A234519 such that A234519(n) > A234519(k) for all k < n.

%C A234519 = natural numbers n sorted by decreasing values of number k(n) = sigma(n)^(1/n), where sigma(n) = A000203(n) = the sum of divisors of n.

%C Conjecture: a(n) = supersequence of A002093 - highly abundant numbers - numbers n such that sigma(n) > sigma(m) for all m < n.

%Y Cf. A234515, A234516, A234517, A234518, A234519, A234520, A234522, A234523, A234524.

%K nonn

%O 1,1

%A _Jaroslav Krizek_, Jan 13 2014

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Last modified March 28 20:05 EDT 2024. Contains 371254 sequences. (Running on oeis4.)