A032635 a(n) = floor(n^2 / e).

0, 0, 1, 3, 5, 9, 13, 18, 23, 29, 36, 44, 52, 62, 72, 82, 94, 106, 119, 132, 147, 162, 178, 194, 211, 229, 248, 268, 288, 309, 331, 353, 376, 400, 425, 450, 476, 503, 531, 559, 588, 618, 648, 680, 712, 744, 778, 812, 847, 883, 919, 956, 994, 1033, 1072

Offset: 0

Author

Patrick De Geest, May 15 1998

Keywords

• nonn
• easy

Programs

Mathematica

a[n_]:=Floor[(n^2)/E]; (* Vladimir Joseph Stephan Orlovsky, Dec 12 2008 *)