OFFSET
1,2
COMMENTS
Includes all numbers of the form ((10^k-1)/3 + 5)^2 for k > 1. - Andrew Howroyd, Sep 28 2024
LINKS
Zhao Hui Du, Table of n, a(n) for n = 1..54
FORMULA
a(n) = A053880(n)^2.
EXAMPLE
Terms include 1444, 114244, 11142244, 1111422244, 111114222244, 11111142222244, etc. - Andrew Howroyd, Sep 28 2024
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Patrick De Geest, Mar 15 2000
STATUS
approved