This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A004220 #17 Nov 04 2024 09:31:26 %S A004220 0,3,5,6,7,8,8,9,10,10,10,11,11,11,12,12,12,13,13,13,13,13,14,14,14, %T A004220 14,14,14,15,15,15,15,15,15,15,16,16,16,16,16,16,16,16,16,17,17,17,17, %U A004220 17,17,17,17,17,17,17,17,18,18,18,18,18,18,18,18,18,18,18,18,18,18,19 %N A004220 a(n) = 10*log_10(n) rounded to the nearest integer. %C A004220 When the power of a wave (sound or electrical) increases by a factor of n (such as when n independent/uncorrelated waves of equal power are summed together), this increase is 10*log_10(n) decibels. - _Charles L. Hohn_, Jul 25 2024 %H A004220 Wikipedia, <a href="https://en.wikipedia.org/wiki/Decibel">Decibel</a> %t A004220 Round[10 Log10[Range[60]]] (* _Harvey P. Dale_, Sep 06 2021 *) %Y A004220 Cf. A371933. %K A004220 nonn %O A004220 1,2 %A A004220 _N. J. A. Sloane_