OFFSET
1,4
REFERENCES
See A113827.
EXAMPLE
The least 9-tuple is {199, 409, 619, 829, 1039, 1249, 1459, 1669, 1879}, which is also the beginning of the least 10-tuple. This explains a(n)=0 for n<4.
CROSSREFS
KEYWORD
nonn,hard,more
AUTHOR
Jean-Marc Rebert, Jun 04 2016
STATUS
approved