A374322 Decimal expansion of sqrt(2)*9801/4412.

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

Offset: 1

Author

Paolo Xausa, Jul 04 2024

Keywords

• nonn
• cons

Comments

Approximates Pi, correct to 7 digits.

Examples

			3.1415927300133056603139961890252155185995816071100335596565...
		

Links

• Paolo Xausa, Table of n, a(n) for n = 1..10000
• David H. Bailey and Jonathan M. Borwein, Experimental Mathematics: Examples, Methods and Implications, Notices of the American Mathematical Society, May 2005, Vol. 52, No. 5, p. 511.
• Jonathan M. Borwein, The Experimental Mathematician: the Pleasure of Discovery and the Role of Proof, International Journal of Computers for Mathematical Learning, Vol. 10 (2005), p. 97.
• Index entries for sequences related to the number Pi

Crossrefs

Cf. A000796, A002193, A068028, A068079, A068089, A253214.

Programs

Mathematica

First[RealDigits[Sqrt[2]*9801/4412, 10, 100]]

Python

from math import isqrt
def A374322(n): return isqrt(10**(n-1<<1)*96059601//9732872)%10 # Chai Wah Wu, Jul 04 2024