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A098130
Concatenation of consecutive primes in the forward and reverse order.
0
22, 2332, 235532, 23577532, 235711117532, 2357111331117532, 23571113177131117532, 235711131719917131117532, 2357111317192332917131117532, 23571113171923299232917131117532, 235711131719232931139232917131117532, 2357111317192329313773139232917131117532
OFFSET
1,1
EXAMPLE
2332 is derived by concatenating the first two primes (2 and 3) in the "forward" order and the last two digits are the same primes in the "reverse" order.
MATHEMATICA
Table[With[{cp=Flatten[IntegerDigits/@Prime[Range[n]]]}, FromDigits[Join[cp, Reverse[cp]]]], {n, 20}] (* Harvey P. Dale, Aug 18 2023 *)
CROSSREFS
Sequence in context: A069221 A069222 A117990 * A078278 A231053 A078275
KEYWORD
easy,nonn,base
AUTHOR
Parthasarathy Nambi, Sep 27 2004
EXTENSIONS
Corrected and extended by Harvey P. Dale, Aug 18 2023
STATUS
approved