A069533 a(n) = Sum_{p prime} floor(n^2/p^2) where the sum is over all the primes.
0, 1, 3, 5, 9, 14, 19, 26, 33, 42, 50, 60, 71, 83, 96, 110, 124, 139, 157, 175, 192, 210, 231, 252, 274, 297, 321, 345, 369, 398, 423, 451, 483, 512, 544, 573, 606, 639, 675, 710, 745, 785, 822, 863, 902, 943, 986, 1028, 1070, 1113, 1161, 1207, 1254, 1304
Offset: 1