A176708 - OEIS

%I #11 Sep 29 2021 05:07:49

%S 1,3,6,11,17,25,34,45,58,73,89,108,128,150,174,201,229,260,292,327,

%T 364,403,443,487,533,581,631,684,738,796,855,917,981,1047,1115,1188,

%U 1262,1338,1416,1498,1581,1668,1756,1847,1941,2037,2134,2236,2340,2447,2556

%N Partial sums of A094820.

%o (PARI) f(n) = sum(k=1, n, ceil(numdiv(k)/2)); \\ A094820

%o a(n) = sum(k=1, n, f(k)); \\ _Michel Marcus_, Sep 29 2021

%Y Cf. A038548, A094820.

%K easy,nonn

%O 1,2

%A _Jonathan Vos Post_, Apr 24 2010

%E a(2) corrected by _Georg Fischer_, Sep 29 2021