OFFSET
1,2
COMMENTS
LINKS
EXAMPLE
1 is present, as 1 = empty product and 1 < 2.
2 = p_1 is in the sequence, as p_2 = 3 and 3/2 < 2.
4 = p_1 * p_1 is not a member, as p_2 * p_2 = 3*3 = 9, and 9/4 > 2.
22 = 2*11 = p_1 * p_5 is a member, as p_2 * p_6 = 39, and 39/22 < 2.
PROG
(PARI)
A003961(n) = my(f = factor(n)); for (i=1, #f~, f[i, 1] = nextprime(f[i, 1]+1)); factorback(f); \\ From A003961
isA246281(n) = (A003961(n) < (n+n));
n = 0; i = 0; while(i < 10000, n++; if(isA246281(n), i++; write("b246281.txt", i, " ", n)));
(Scheme, with Antti Karttunen's IntSeq-library)
CROSSREFS
KEYWORD
nonn
AUTHOR
Antti Karttunen, Aug 24 2014
EXTENSIONS
A new shorter version of name prepended by Antti Karttunen, Aug 27 2020
STATUS
approved