OFFSET
1,2
LINKS
Andrew Howroyd, Table of n, a(n) for n = 1..100
EXAMPLE
a(5) = 102030405 = 510152025/5, where 510152025 is obtained by concatenating 5,10,15,20 and finally 25 (which is 5^2).
PROG
(PARI) a(n)={fromdigits(concat(vector(n, k, digits(k*n))))/n} \\ Andrew Howroyd, Nov 09 2019
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Amarnath Murthy, Apr 19 2001
EXTENSIONS
Offset corrected and terms a(7) and beyond from Andrew Howroyd, Nov 09 2019
STATUS
approved