%I #15 Feb 05 2024 03:49:22
%S 2,6,11,50,137,147,363,1522,7129,7381,83711,86021,1145993,1171733,
%T 1195757,4873118,42142223,42822903,275295799,279175675,56574159,
%U 19093197,444316699,1347822955,34052522467,34395742267,312536252003,315404588903,9227046511387
%N a(n) = numerator of Sum_{i=1..n} Sum_{j=1..n} (1/i + 1/j).
%t Numerator[Table[Sum[Sum[1/i + 1/j, {i, 1, n}], {j, 1, n}], {n, 1, 29}]]
%o (Python)
%o from sympy import harmonic
%o def A368810(n): return ((n<<1)*harmonic(n)).p # _Chai Wah Wu_, Feb 04 2024
%Y Cf. A027611, A096620 (denominators), A193758.
%K nonn,frac
%O 1,1
%A _Mats Granvik_, Jan 06 2024