A052070 Smallest square all of whose digits occur with the same frequency n.

0, 7744, 100220121, 1001481404808481, 269996262622969, 445646655445456656, 114811414848448481881, 425425422552255452244544, 244848282488224248488284224, 610016161160606006011116601600

Offset

1,2

Links

Table of n, a(n) for n=1..10.

Patrick De Geest, Numbers whose digits occur with same frequency

Example

1001481404808481 (= 31646191^2) and its digits 0, 1, 4 and 8 each occur four times.

Mathematica

Table[i = 0;
While[x = i^2; Union@DeleteCases[DigitCount[x], 0] != {n}, i++];
x, {n, 10}] (* Robert Price, Oct 12 2019 *)

Crossrefs

Cf. A052069, A045540, A052046, A052049, A052050, A052072.

Sequence in context: A187958 A052050 A116064 * A052099 A079035 A116317

Adjacent sequences: A052067 A052068 A052069 * A052071 A052072 A052073

Keyword

nonn,base,more,nice

Author

Patrick De Geest, Jan 15 2000

Extensions

Two more terms from Jon E. Schoenfield, Oct 11 2008

Offset corrected by Michel Marcus, Aug 12 2015

a(10) from Giovanni Resta, Aug 19 2018

Status

approved