A159020 a(0)=11; a(n) = a(n-1) + floor(sqrt(a(n-1))), n > 0.

11, 14, 17, 21, 25, 30, 35, 40, 46, 52, 59, 66, 74, 82, 91, 100, 110, 120, 130, 141, 152, 164, 176, 189, 202, 216, 230, 245, 260, 276, 292, 309, 326, 344, 362, 381, 400, 420, 440, 460, 481, 502, 524, 546, 569

Offset

0,1

Comments

Row 2 in square array A159016.

This sequence contains an infinite number of squares. - Philippe Deléham, Apr 04 2009

The squares in this sequence are A020714(k)^2, k=0,1,2,.... - Vincenzo Librandi, Apr 20 2009 [clarified by R. J. Mathar, Dec 05 2010]

Links

Table of n, a(n) for n=0..44.

Crossrefs

Cf. A028392, A020714.

Sequence in context: A025060 A093669 A084805 * A015830 A242098 A163672

Adjacent sequences: A159017 A159018 A159019 * A159021 A159022 A159023

Keyword

nonn

Author

Philippe Deléham, Apr 02 2009

Status

approved