A328820 Fourth digit after decimal point of square root of n.

0, 2, 0, 0, 0, 4, 7, 4, 0, 2, 6, 1, 5, 6, 9, 0, 1, 6, 8, 1, 5, 4, 8, 9, 0, 0, 1, 5, 1, 2, 7, 8, 5, 9, 0, 0, 7, 4, 9, 5, 1, 7, 4, 2, 2, 3, 6, 2, 0, 0, 4, 1, 1, 4, 1, 3, 8, 7, 1, 9, 2, 0, 2, 0, 2, 0, 3, 2, 6, 6, 1, 2, 0, 3, 2, 7, 9, 7, 1, 2, 0, 3, 4, 1, 5, 6, 3, 8, 9, 8, 3, 6, 6, 3, 7, 9, 8, 4, 8, 0

Offset: 1

Author

Maxim Skorohodov, Oct 28 2019

Keywords

• nonn
• easy
• base

Examples

			sqrt(5) = 2.23606798..., so a(5) = 0.
		

Links

• Maxim Skorohodov, Table of n, a(n) for n = 1..10000

Crossrefs

Cf. A111862, A023961.

Formula

a(n) = A010879(A000196(100000000*n)).