A277441 Least number k such that k^2 can be obtained from k by inserting n internal (but not necessarily contiguous) digits.

0, 10, 95, 950, 9500, 89476, 894760, 8946105, 89448001, 894438005, 8944300005, 89442827780, 894427300005, 8944273000005, 89442720000005, 894427196000005, 8944271912400005, 89442719120000005, 894427191000000005, 8944271910000000005, 89442719100000000005, 894427191000000000005

Offset

0,2

Comments

A subsequence of A046851.

Links

Table of n, a(n) for n=0..21.

Example

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.

Crossrefs

Cf. A046851, A277442.

Sequence in context: A163738 A190987 A233738 * A307021 A197083 A197086

Adjacent sequences: A277438 A277439 A277440 * A277442 A277443 A277444

Keyword

nonn,base

Author

Ivan N. Ianakiev, Oct 15 2016

Extensions

More terms from Paolo P. Lava, Oct 20 2016

a(13)-a(21) from Giovanni Resta, Jul 06 2019

Status

approved