OFFSET
1,2
LINKS
Jeppe Stig Nielsen, Table of n, a(n) for n = 1..23
Eric Weisstein's World of Mathematics, Demlo Number
PROG
(PARI) for(k=1, 100, my(d=((10^k-1)/9)^2); issquare(sumdigits(d)) && print1(d, ", ")) \\ Jeppe Stig Nielsen, May 27 2023
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Eric W. Weisstein, Jan 31 2003
STATUS
approved