A378927 Positive numbers whose squares have at most three digits less than 9.

1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 33, 36, 37, 43, 44, 47, 53, 54, 57, 63, 64, 67, 70, 73, 77, 83, 86, 87, 89, 93, 95, 96, 97, 98, 99, 114, 173, 187, 223, 243, 263, 264, 303, 307, 313, 314, 315, 316, 437, 447, 547, 707, 964, 997, 1414, 2236, 2827, 3033, 3114, 3148, 3161

Offset

1,2

Comments

No terms > 3161 with less than 16 digits.

No terms > 3161 with less than 101 digits. - Michael S. Branicky, Dec 11 2024

Links

Table of n, a(n) for n=1..82.

Example

3161 is a term because 3161^2 = 9991921 has only three digits that are less than 9.

Mathematica

Select[Range[10^6], Count[IntegerDigits[#^2], _?(#1 < 9 &)] < 4 &]

Crossrefs

Cf. A053934, A360822, A378925, A378926.

Sequence in context: A166718 A132016 A032513 * A272323 A273881 A048266

Adjacent sequences: A378924 A378925 A378926 * A378928 A378929 A378930

Keyword

nonn,base

Author

Zhining Yang, Dec 11 2024

Status

approved