cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A074053 Numbers n such that A001414(n) = sum of composites from the smallest prime factor of n to the largest prime factor of n.

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%I A074053 #12 Jan 07 2025 15:17:16
%S A074053 1,21,5324,9625,12705,13552,15246,18150,19360,21780,22638,23232,26136,
%T A074053 26950,29403,32340,34496,38500,38808,39325,41405,43659,46137,46200,
%U A074053 49280,51909,51975,55000,55440,59136,61875,62370,65910,66000,66528
%N A074053 Numbers n such that A001414(n) = sum of composites from the smallest prime factor of n to the largest prime factor of n.
%e A074053 Sum of primes dividing 5324 with repetition is: 2+2+11+11+11 = 37 and sum of composites between 2 and 11 is 4+6+8+9+10 = 37.
%Y A074053 Cf. A001414, A074037.
%K A074053 nonn
%O A074053 1,2
%A A074053 _Jason Earls_, Sep 15 2002