A076677 a(0)=a(1)=1 a(n)=a(n-1)+floor(sqrt(a(n-2))).

1, 1, 2, 3, 4, 5, 7, 9, 11, 14, 17, 20, 24, 28, 32, 37, 42, 48, 54, 60, 67, 74, 82, 90, 99, 108, 117, 127, 137, 148, 159, 171, 183, 196, 209, 223, 237, 251, 266, 281, 297, 313, 330, 347, 365, 383, 402, 421, 441, 461, 482, 503, 524, 546, 568, 591, 614, 638, 662