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A156120
First of a prime pair formed by concatenating n with n-1, and a matching prime (not shown) formed by concatenating n-2 with n-3.
0
2423, 102101, 114113, 210209, 264263, 270269, 330329, 342341, 414413, 762761, 774773, 840839, 852851, 912911, 10021001, 11101109, 17641763, 20222021, 21302129, 22322231, 26822681, 27242723, 28322831, 32523251, 36723671
OFFSET
1,1
EXAMPLE
Example: 2423 and matching prime 2221 (not shown), where n = 24.
CROSSREFS
Sequence in context: A254901 A254908 A257203 * A078868 A340433 A340899
KEYWORD
nonn,base
AUTHOR
Ki Punches, Feb 16 2009
EXTENSIONS
Edited and extended by Ray Chandler, Feb 20 2009
STATUS
approved