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 A277441 Least number k such that k^2 can be obtained from k by inserting n internal (but not necessarily contiguous) digits. 1
 0, 10, 95, 950, 9500, 89476, 894760, 8946105, 89448001, 894438005, 8944300005, 89442827780, 894427300005, 8944273000005, 89442720000005, 894427196000005, 8944271912400005, 89442719120000005, 894427191000000005, 8944271910000000005, 89442719100000000005, 894427191000000000005 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 COMMENTS A subsequence of A046851. LINKS 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. MAPLE P:=proc(q) local a, b, d, j, k, n, ok, t; t:=1; print(0); for n from 1 to q do for k from t to q do if ilog10(k^2)=ilog10(k)+n then if (k^2 mod 10)=(k mod 10) and trunc(k^2/10^(ilog10(k^2)))=trunc(k/10^(ilog10(k))) then a:=convert(k, base, 10); b:=convert(k^2, base, 10); ok:=1; d:=1; for j from 2 to nops(a)-1 do while d

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Last modified August 18 22:58 EDT 2022. Contains 356215 sequences. (Running on oeis4.)