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A246973
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n^2 concatenated with (n+1)^2.
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5
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1, 14, 49, 916, 1625, 2536, 3649, 4964, 6481, 81100, 100121, 121144, 144169, 169196, 196225, 225256, 256289, 289324, 324361, 361400, 400441, 441484, 484529, 529576, 576625, 625676, 676729, 729784, 784841, 841900, 900961, 9611024, 10241089, 10891156, 11561225, 12251296, 12961369, 13691444
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graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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0,2
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LINKS
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EXAMPLE
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a(2) = 49 because 2^2 = 4 and 3^2 = 9.
a(3) = 916 because 3^2 = 9 and 4^2 = 16.
a(4) = 1625 because 4^2 = 16 and 5^2 = 25.
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MAPLE
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a:= n-> parse(cat(n^2, (n+1)^2)):
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MATHEMATICA
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Table[FromDigits[Join[IntegerDigits[n^2], IntegerDigits[(n + 1)^2]]], {n, 0, 39}] (* Alonso del Arte, Sep 13 2014 *)
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PROG
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(Magma) [1] cat [Seqint(Intseq(n^2+2*n+1) cat Intseq(n^2)): n in [1..50]]; // Vincenzo Librandi, Sep 13 2014
(PARI) A246973(n)=n^2*10^logint(10*(n+1)^2, 10)+(n+1)^2 \\ Over 4 x faster than using eval(Str(...)). - M. F. Hasler, May 27 2018
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CROSSREFS
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KEYWORD
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nonn,base,easy
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AUTHOR
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STATUS
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approved
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