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

Author

Zhining Yang, Dec 11 2024

Keywords

• nonn
• base

Comments

No terms > 3161 with less than 16 digits.

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

Examples

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

Crossrefs

Cf. A053934, A360822, A378925, A378926.

Programs

Mathematica

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