a(n) is the number of complete squares that fit inside the circle with radius n, drawn on squared paper at (0, 0).

A119677

a(n) is the number of complete squares that fit inside the circle with radius n, drawn on squared paper at (0, 0).

Terms

    a(0) =0a(1) =0a(2) =4a(3) =16a(4) =32a(5) =60a(6) =88a(7) =120a(8) =164a(9) =216a(10) =276a(11) =332a(12) =392a(13) =476a(14) =556a(15) =648a(16) =732a(17) =832a(18) =936a(19) =1052a(20) =1176a(21) =1288a(22) =1428a(23) =1560a(24) =1696a(25) =1860a(26) =2016a(27) =2180a(28) =2340a(29) =2512

External references