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 A299790 Positive integers that do not equal any number minus its number of factorizations. 0

%I

%S 3,9,15,21,26,29,34,35,38,39,43,45,50,51,54,57,62,69,74,86,87,90,98,

%T 101,103,107,110,111,114,118,123,124,134,135,137,142,146,151,152,155,

%U 158,161,163,170,173,174,179,186,188,189,191,194,197,206,214,218,220,221,227,229,230,231,237,239,242,244,246,248

%N Positive integers that do not equal any number minus its number of factorizations.

%o (PARI) fcnt(n, m) = {local(s); s=0; if(n == 1, s=1, fordiv(n, d, if(d > 1 & d <= m, s=s+fcnt(n/d, d)))); s};

%o f(n) = n - fcnt(n, n);

%o is(n) = j=1;x=2^(floor(log(n)/log(2))+2);while(j<x&&f(j)!=n,j++);f(j)!=n; \\ _Jinyuan Wang_, Feb 14 2019

%Y Cf. A001055 (number of factorizations).

%K nonn

%O 1,1

%A _Aidan Clarke_, Jan 21 2019

%E More terms from _Jinyuan Wang_, Feb 14 2019

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Last modified May 26 05:25 EDT 2019. Contains 323579 sequences. (Running on oeis4.)