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

3, 9, 15, 21, 26, 29, 34, 35, 38, 39, 43, 45, 50, 51, 54, 57, 62, 69, 74, 86, 87, 90, 98, 101, 103, 107, 110, 111, 114, 118, 123, 124, 134, 135, 137, 142, 146, 151, 152, 155, 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

Offset

1,1

Links

Table of n, a(n) for n=1..68.

Prog

(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};
f(n) = n - fcnt(n, n);
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

Crossrefs

Cf. A001055 (number of factorizations).

Sequence in context: A324298 A194041 A029506 * A030594 A032676 A366849

Adjacent sequences: A299787 A299788 A299789 * A299791 A299792 A299793

Keyword

nonn

Author

Aidan Clarke, Jan 21 2019

Extensions

More terms from Jinyuan Wang, Feb 14 2019

Status

approved