A378926 Positive numbers whose squares have at most two digits less than 9.

1, 2, 3, 4, 5, 6, 7, 8, 9, 13, 14, 17, 23, 27, 30, 31, 63, 77, 97, 173, 313

Offset

1,2

Comments

No terms > 313 with less than 16 digits.

No terms > 313 with less than 1040 digits. - Michael S. Branicky, Dec 11 2024

Links

Table of n, a(n) for n=1..21.

Example

313 is a term because 313^2 = 97969 has only two digits that are less than 9.

Mathematica

Select[Range[10^6], Count[IntegerDigits[#^2], _?(#1 < 9 &)] < 3&]

Crossrefs

Cf. A053934, A360822, A378925, A378927.

Sequence in context: A219248 A055568 A360822 * A283161 A165165 A075776

Adjacent sequences: A378923 A378924 A378925 * A378927 A378928 A378929

Keyword

nonn,base

Author

Zhining Yang, Dec 11 2024

Status

approved