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Partial sums of A005109.
0

%I #9 Oct 12 2024 02:28:55

%S 2,5,10,17,30,47,66,103,176,273,382,545,738,995,1428,1915,2492,3261,

%T 4414,5711,7170,9763,12680,16137,20026,30395,42684,60181,78614,117981,

%U 170470,236007,375976,523433,733386,1065163,1537556,2167413,2913910

%N Partial sums of A005109.

%F a(n) = Sum_{i=1..n} A005109(i).

%e a(20) = 2 + 3 + 5 + 7 + 13 + 17 + 19 + 37 + 73 + 97 + 109 + 163 + 193 + 257 + 433 + 487 + 577 + 769 + 1153 + 1297 = 5711.

%Y Cf. A005109.

%K easy,nonn

%O 1,1

%A _Jonathan Vos Post_, Jan 28 2010

%E More terms from _R. J. Mathar_, Feb 07 2010