OFFSET
1,1
COMMENTS
Start with a blank concatenation string S. Does prime p(1)=2 appear in string S? No. Concatenate 2 to string S. Does prime p(2)=3 appear in string S="2"? No. Concatenate 3 to string S. Does prime p(3)=5 appear in string S="23"? No. Concatenate 5 to string S. and so on Does prime p(9)=23 appear in string S="235711131719"? Yes. 23 is in the sequence. Do not concatenate 23 to string S.
EXAMPLE
a(1)= 23 because 23 appears in the string 235711131719. a(3)= 71 because 71 appears in the string 235711131719293741434753596167. (Notice "23" is omitted from the string here: 235711131719--293741434753596167.)
CROSSREFS
KEYWORD
easy,nonn,base
AUTHOR
Gil Broussard, Jan 19 2009
STATUS
approved