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A295571 a(n) = A081881(n) - 1. 2

%I #16 Apr 05 2020 04:51:11

%S 0,1,3,9,25,68,185,503,1368,3719,10110,27482,74704,203067,551994,

%T 1500476,4078717,11087103,30137871,81923227,222690420,605335322,

%U 1645472006,4472856654,12158484964,33050188740,89839727479,244209698680,663830786256,1804479163452,4905082919845

%N a(n) = A081881(n) - 1.

%C The blocks of fractions described in A081881 extend from 1/A081881(k) through 1/a(k+1) and contain A295572(k) terms. For example the third block is 1/4 + 1/5 + 1/6 + 1/7 + 1/8 + 1/6 and has length 6.

%H Jinyuan Wang, <a href="/A295571/b295571.txt">Table of n, a(n) for n = 1..1000</a>

%Y Cf. A081881, A295572.

%K nonn

%O 1,3

%A _N. J. A. Sloane_, Nov 30 2017

%E More terms from _Jinyuan Wang_, Feb 20 2020

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Last modified May 5 17:32 EDT 2024. Contains 372277 sequences. (Running on oeis4.)