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Sum of the first n decimal places of Catalan's constant 0.9159655941772... (sequence A006752).
2

%I #12 Aug 23 2018 02:15:45

%S 9,10,15,24,30,35,40,49,53,54,61,68,70,71,80,80,81,86,86,91,95,101,

%T 101,104,109,110,114,123,126,128,131,139,143,144,145,145,152,159,163,

%U 164,168,177,180,187,191,193,201,202,208,215,217,218,221,225,227,233,239

%N Sum of the first n decimal places of Catalan's constant 0.9159655941772... (sequence A006752).

%H G. C. Greubel, <a href="/A099616/b099616.txt">Table of n, a(n) for n = 1..10000</a>

%e Catalan's constant = 0.9159655941772... so the sums are 9, 9+1, 9+1+5, 9+1+5+9, 9+1+5+9+6..., leading to the terms 9, 10, 15, 24, 30, ...

%t Accumulate[RealDigits[N[Catalan,60]][[1]]] (* _Harvey P. Dale_, May 10 2011 *)

%Y Cf. A006752 for digits of Catalan's constant. Similarly constructed sequences for other constants at A099541 and sequence references therein.

%K base,easy,nonn

%O 1,1

%A Mark Hudson (mrmarkhudson(AT)hotmail.com), Oct 25 2004