A111894 Number of numbers m <= n such that 4 equals the second digit after decimal point of square root of n in decimal representation.

0, 0, 0, 0, 0, 1, 2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 5, 5, 5, 5, 5, 5, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 7, 7, 7, 8, 8, 8, 9, 9, 9, 10, 10, 10, 10, 10, 10, 10, 10, 11, 11, 11, 11, 11, 12, 12, 12, 12, 12, 12, 12, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13

Offset: 1

Author

Reinhard Zumkeller, Aug 20 2005

Keywords

• nonn
• base

Examples

			a(10) = 2, a(100) = 17, a(1000) = 121, a(10000) = 1066.
		

Crossrefs

Cf. A111890, A111891, A111892, A111893, A111895, A111896, A111897, A111898, A111899, A111854.