A159023 a(0)=41; a(n) = a(n-1) + floor(sqrt(a(n-1))), n > 0.

41, 47, 53, 60, 67, 75, 83, 92, 101, 111, 121, 132, 143, 154, 166, 178, 191, 204, 218, 232, 247, 262, 278, 294, 311, 328, 346, 364, 383, 402, 422, 442, 463, 484, 506, 528, 550, 573, 596, 620, 644, 669, 694, 720, 746, 773, 800, 828, 856, 885, 914, 944, 974, 1005, 1036

Offset

0,1

Comments

Row 5 in square array A159016.

This sequence contains infinitely many squares. - Philippe Deléham, Apr 04 2009

Links

Table of n, a(n) for n=0..54.

Mathematica

NestList[#+Floor[Sqrt[#]]&, 41, 60] (* Harvey P. Dale, Nov 06 2011 *)

Crossrefs

Cf. A028392

Sequence in context: A106414 A068582 A158847 * A136294 A180547 A329446

Adjacent sequences: A159020 A159021 A159022 * A159024 A159025 A159026

Keyword

nonn

Author

Philippe Deléham, Apr 02 2009

Extensions

More terms from Vincenzo Librandi, Apr 10 2009

Error in sequence corrected by Jon E. Schoenfield, Jun 23 2010

Status

approved