The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A231878 Numbers n such that bigomega(n)^2 (cf. A001222) divides n. 2
 2, 3, 4, 5, 7, 11, 13, 16, 17, 18, 19, 23, 27, 29, 31, 37, 41, 43, 45, 47, 53, 59, 61, 63, 67, 71, 73, 79, 83, 89, 97, 99, 101, 103, 107, 109, 113, 117, 127, 131, 137, 139, 144, 149, 151, 153, 157, 163, 167, 171, 173, 179, 181, 191, 193, 197, 199, 200, 207, 211, 216, 223, 227, 229, 233, 239, 241, 251, 256, 257, 261, 263 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Contains all primes. - Ivan Neretin, Apr 05 2016 LINKS Ivan Neretin, Table of n, a(n) for n = 1..13517 (all terms up to 10^5) MATHEMATICA Select[Range[2, 265], Divisible[#, PrimeOmega[#]^2] &] (* Ivan Neretin, Apr 05 2016 *) PROG (PARI) isok(n) = !(n % bigomega(n)^2); \\ Michel Marcus, Apr 05 2016 CROSSREFS Cf. A001221, A075592, A185307, A001222, A074946, A134334, A231879 (complement). Sequence in context: A055464 A139316 A062972 * A285304 A036844 A284696 Adjacent sequences:  A231875 A231876 A231877 * A231879 A231880 A231881 KEYWORD nonn AUTHOR N. J. A. Sloane, Nov 17 2013 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified September 26 02:28 EDT 2020. Contains 337346 sequences. (Running on oeis4.)