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A178388
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Concatenation of the first n primes written in base 3.
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1
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2, 210, 21012, 2101221, 2101221102, 2101221102111, 2101221102111122, 2101221102111122201, 2101221102111122201212, 21012211021111222012121002, 210122110211112220121210021011, 2101221102111122201212100210111101
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OFFSET
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1,1
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LINKS
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EXAMPLE
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a(4) = Concatenate[prime(1) base 3, prime(2) base 3, prime(3) base 3, prime(3) base 3] = Concatenate[2 base 3, 3 base 3, 5 base 3, 7 base 3] = Concatenate[2, 10, 12, 21] = 2101221.
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MATHEMATICA
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Module[{nn=15, p3}, p3=IntegerDigits[Prime[Range[nn]], 3]; Table[FromDigits[Flatten[ Take[p3, n]]], {n, nn}]] (* Harvey P. Dale, Aug 25 2022 *)
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PROG
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(PARI) v = 0; for (n=1, 12, d = digits(prime(n), 3); v = v*10^#d + fromdigits(d); print1 (v ", ")) \\ Rémy Sigrist, Aug 07 2017
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CROSSREFS
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KEYWORD
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base,easy,nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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