A366248 Decimal expansion of sqrt(666).
2, 5, 8, 0, 6, 9, 7, 5, 8, 0, 1, 1, 2, 7, 8, 8, 0, 3, 1, 5, 1, 8, 8, 4, 2, 0, 6, 0, 5, 1, 4, 9, 1, 4, 0, 8, 9, 6, 0, 8, 2, 6, 0, 6, 6, 7, 1, 8, 7, 2, 2, 0, 6, 8, 5, 8, 5, 2, 4, 1, 3, 6, 9, 2, 3, 7, 1, 2, 2, 8, 0, 8, 0, 3, 9, 8, 9, 0, 5, 1, 0, 3, 8, 3, 4, 9, 9
Offset: 2
Examples
25.80697580112788031518842060514914089608260667187220685852413692371228...
References
- C. A. Pickover, The Mathematics of Oz, pp. 274, Cambridge University Press 2002.
Links
- Paolo Xausa, Table of n, a(n) for n = 2..10000
Programs
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Mathematica
First[RealDigits[Sqrt[666], 10, 100]] (* Paolo Xausa, Nov 06 2023 *)
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PARI
\\ Works in v2.13 and higher; n = 100 decimal places my(n=100); digits(floor(10^n*quadgen(2664))) \\ Michal Paulovic, Oct 14 2023
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Python
from math import isqrt def A366248(n): return (isqrt(666//10**(3-n<<1)) if n<3 else isqrt(666*10**(n-3<<1))) % 10 # Chai Wah Wu, Nov 06 2023