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A084123
Palindromic numbers which are equal to a number n multiplied by the n-th prime.
2
2, 6, 55, 444, 848, 122555221, 161131161, 5729689869275, 7587952597857, 35757255275753, 182196497222794691281
OFFSET
1,1
COMMENTS
a(12) > 4.3*10^26. [Giovanni Resta, Jun 28 2013]
EXAMPLE
The palindrome 161131161 is in the sequence since 39119 is the 4119th prime and 4199*39119 = 161131161.
MATHEMATICA
palQ[n_]:=FromDigits[Reverse[IntegerDigits[n]]]==n; t={}; Do[If[palQ[x=n*Prime[n]], AppendTo[t, x]], {n, 15*10^5}]; t (* Jayanta Basu, May 11 2013 *)
CROSSREFS
Sequence in context: A264610 A153450 A179389 * A193473 A336899 A181509
KEYWORD
base,nonn
AUTHOR
Giovanni Resta, May 14 2003
STATUS
approved