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Least number k such that k^2 can be obtained from k by inserting n internal (but not necessarily contiguous) digits.
1

%I #20 Mar 03 2024 10:14:59

%S 0,10,95,950,9500,89476,894760,8946105,89448001,894438005,8944300005,

%T 89442827780,894427300005,8944273000005,89442720000005,

%U 894427196000005,8944271912400005,89442719120000005,894427191000000005,8944271910000000005,89442719100000000005,894427191000000000005

%N Least number k such that k^2 can be obtained from k by inserting n internal (but not necessarily contiguous) digits.

%C A subsequence of A046851.

%e a(2) = 95 as 95 is the least number that needs two internal digits inserted to become its square, i.e., 95 squared is 9(02)5.

%Y Cf. A046851, A277442.

%K nonn,base

%O 0,2

%A _Ivan N. Ianakiev_, Oct 15 2016

%E More terms from _Paolo P. Lava_, Oct 20 2016

%E a(13)-a(21) from _Giovanni Resta_, Jul 06 2019