A161835 Numbers k whose largest divisor <= sqrt(k) is 5.

25, 30, 35, 40, 45, 50, 55, 65, 75, 85, 95, 115, 125, 145, 155, 185, 205, 215, 235, 265, 295, 305, 335, 355, 365, 395, 415, 445, 485, 505, 515, 535, 545, 565, 635, 655, 685, 695, 745, 755, 785, 815, 835, 865, 895, 905, 955, 965, 985, 995, 1055, 1115, 1135, 1145, 1165, 1195

Offset

1,1

Comments

See A161344 for more information. - Omar E. Pol, Jul 05 2009

Links

Table of n, a(n) for n=1..56.

Formula

Numbers k such that A033676(k)=5. - Omar E. Pol, Jul 05 2009

Mathematica

Select[Range[1, 1000], Function[m, Max[Select[Divisors[m], # <= Sqrt[m] &]] == 4]] (* Ashton Baker, Nov 03 2013 *)

Prog

(PARI) is(n)=divisors(n)[(numdiv(n)+1)\2]==5 \\ - M. F. Hasler, Nov 03 2013

Crossrefs

Cf. A033676, A008578, A161344, A161345, A161424, A161835, A162526, A162527, A162528, A162529, A162530, A162531, A162532.

Sequence in context: A234640 A219258 A044861 * A284045 A213929 A167324

Adjacent sequences: A161832 A161833 A161834 * A161836 A161837 A161838

Keyword

easy,nonn

Author

Omar E. Pol, Jun 20 2009

Extensions

Definition and more terms added by R. J. Mathar, Jun 28 2009

Status

approved