OFFSET
1,1
COMMENTS
A curved-digit semiprime has only the curved digits, i.e., 0, 2, 3, 5, 6, 8 or 9.
LINKS
K. D. Bajpai, Table of n, a(n) for n = 1..3484
EXAMPLE
358 = 2 * 179 is semiprime having only the curved digits 3, 5 and 8. Hence appears in the sequence.
689 = 13 * 53 is semiprime having only the curved digits 6, 8 and 9. Hence appears in the sequence.
MATHEMATICA
PROG
(PARI) s=[]; for(n=1, 600, if(bigomega(n)==2 && setintersect(vecsort(digits(n), , 8), [1, 4, 7])==[], s=concat(s, n))); s \\ Colin Barker, Jun 03 2014
CROSSREFS
KEYWORD
nonn,base
AUTHOR
K. D. Bajpai, May 22 2014
STATUS
approved