A053062 Concatenate n, 2n, 3n, ... nn.

1, 24, 369, 481216, 510152025, 61218243036, 7142128354249, 816243240485664, 91827364554637281, 102030405060708090100, 112233445566778899110121, 1224364860728496108120132144, 13263952657891104117130143156169, 14284256708498112126140154168182196

Offset: 1

Author

Felice Russo, Feb 25 2000

Keywords

• easy
• base
• nonn
• less

References

• Felice Russo, A set of new Smarandache functions, sequences and conjectures in number theory, American Research Press 2000.

Crossrefs

Cf. A061082.

Programs

Maple

a:= n-> parse(cat(j*n$j=1..n)):
seq(a(n), n=1..14);  # Alois P. Heinz, Jan 24 2021

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