



1, 1, 2, 1, 3, 3, 4, 3, 3, 5, 8, 7, 8, 9, 10, 8, 9, 9, 9, 12, 11, 10, 11, 13, 13, 13, 13, 14, 16, 16, 16, 18, 18, 17, 21, 19, 18, 18, 22, 22, 23, 22, 23, 22, 25, 26, 28, 28, 27, 27, 29, 29, 30, 31, 32, 34, 30, 29, 29, 30, 31, 33, 35, 35, 32, 30, 32, 33, 31, 30, 30, 33
(list;
graph;
refs;
listen;
history;
text;
internal format)



OFFSET

0,3


COMMENTS

If for every term t > 1 in A002182 there is some term t/p where pt in A002182 then a(n) > 0 for all n.
The above hypothesis isn't true, e.g., t = A002182(815) is a counterexample. But it is surely true that a(n) > 0 for all n, see the graph of A112778.  M. F. Hasler, Jan 08 2020


LINKS

Table of n, a(n) for n=0..71.


PROG

(PARI) {my(v=v112778, c=Vec(0, vecmax(v)); for(i=2, #v, c[v[i]]++); c[1..log(#c)\1]} \\ Does not include the leading a(0)=1. Discards log(#c) possibly inaccurate trailing terms. Vector v112778 must be defined, e.g., from bfile of A112778.  M. F. Hasler, Jan 08 2020


CROSSREFS

Cf. A001222, A002182.
Cf. A112778 (bigomega of HCNs).
Sequence in context: A218975 A048619 A116087 * A163281 A307857 A116921
Adjacent sequences: A328515 A328516 A328517 * A328519 A328520 A328521


KEYWORD

nonn


AUTHOR

David A. Corneth, Jan 04 2020


STATUS

approved



