A067713 a(n+1) is the smallest square > a(n) such that the digits of a(n) are all (with multiplicity) contained in the digits of a(n+1), with a(0)=1.

1, 16, 169, 196, 961, 1296, 2916, 9216, 12769, 96721, 237169, 729316, 1073296, 1630729, 2709316, 10329796, 69739201, 109327936, 130279396, 133079296, 133702969, 309971236, 317302969, 917302369, 1353209796, 1725903936

Offset: 0

Author

Marc Paulhus, Feb 05 2002

Keywords

• base
• nonn

Crossrefs

Cf. A014563.

Formula

a(n) = A014563(n)^2.