OFFSET
1,1
COMMENTS
The semiprimes in A132903.
LINKS
EXAMPLE
235 is in the sequence because concatenation of [2, 3, 5] = 235 = 5 * 47, which is semiprime.
71113 is in the sequence because concatenation of [7, 11, 13] = 71113 = 7 * 10159, which is semiprime.
111317 is not in the sequence because, though 111317 is concatenation of three consecutive primes [11, 13, 17], but it is not semiprime.
MAPLE
MATHEMATICA
CROSSREFS
KEYWORD
nonn,base
AUTHOR
K. D. Bajpai, Jun 17 2014
STATUS
approved