A053062 Concatenate n, 2n, 3n, ... nn.
1, 24, 369, 481216, 510152025, 61218243036, 7142128354249, 816243240485664, 91827364554637281, 102030405060708090100, 112233445566778899110121, 1224364860728496108120132144, 13263952657891104117130143156169, 14284256708498112126140154168182196
Offset: 1
References
- Felice Russo, A set of new Smarandache functions, sequences and conjectures in number theory, American Research Press 2000.
Crossrefs
Cf. A061082.
Programs
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Maple
a:= n-> parse(cat(j*n$j=1..n)): seq(a(n), n=1..14); # Alois P. Heinz, Jan 24 2021
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Python
def a(n): return int("".join(str(n*i) for i in range(1, n+1))) print([a(n) for n in range(1, 15)]) # Michael S. Branicky, Jan 24 2021
Extensions
More terms from James Sellers, Feb 28 2000