A061088 a(n) = A053062(n) / n.

1, 12, 123, 120304, 102030405, 10203040506, 1020304050607, 102030405060708, 10203040506070809, 10203040506070809010, 10203040506070809010011, 102030405060708009010011012, 1020304050607008009010011012013, 1020304050607008009010011012013014

Offset: 1

Author

Amarnath Murthy, Apr 19 2001

Keywords

• nonn
• base

Examples

			a(5) = 102030405 = 510152025/5, where 510152025 is obtained by concatenating 5,10,15,20 and finally 25 (which is 5^2).
		

Links

• Andrew Howroyd, Table of n, a(n) for n = 1..100

Crossrefs

Cf. A053062.

Programs

PARI

a(n)={fromdigits(concat(vector(n, k, digits(k*n))))/n} \\ Andrew Howroyd, Nov 09 2019

Extensions

Offset corrected and terms a(7) and beyond from Andrew Howroyd, Nov 09 2019