A361612 Decimal expansion of sqrt(10) truncated to n places (after the decimal point).

3, 31, 316, 3162, 31622, 316227, 3162277, 31622776, 316227766, 3162277660, 31622776601, 316227766016, 3162277660168, 31622776601683, 316227766016837, 3162277660168379, 31622776601683793, 316227766016837933, 3162277660168379331, 31622776601683793319

Offset

0,1

Links

Table of n, a(n) for n=0..19.

Formula

a(n) = floor(sqrt(10) * 10^n).

a(n) = A017934(2*n + 1).

a(n-1) mod 10 = A010467(n). - Chai Wah Wu, Mar 26 2023

Mathematica

Floor[Sqrt[10]*10^Range[0, 20]] (* Paolo Xausa, Jul 25 2024 *)

Prog

(Python)
from math import isqrt
def A361612(n): return isqrt(10**((n<<1)|1)) # Chai Wah Wu, Mar 26 2023

Crossrefs

Cf. A010467, A011547, A017934.

Sequence in context: A089289 A011545 A011546 * A276195 A210852 A152276

Adjacent sequences: A361609 A361610 A361611 * A361613 A361614 A361615

Keyword

nonn

Author

Amit Katz, Mar 17 2023

Status

approved