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!)
 A119431 Primitive elements of A054741. 2
 6, 10, 14, 22, 26, 34, 38, 46, 58, 62, 74, 82, 86, 94, 105, 106, 118, 122, 134, 142, 146, 158, 165, 166, 178, 194, 195, 202, 206, 214, 218, 226, 254, 262, 274, 278, 298, 302, 314, 326, 334, 346, 358, 362, 382, 386, 394, 398, 422, 446, 454, 458, 466, 478, 482 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Elements of A054741 that are not divisible by any smaller element of that sequence. LINKS Amiram Eldar, Table of n, a(n) for n = 1..10000 FORMULA Consists of 2p for p an odd prime, plus odd elements of A119433. MATHEMATICA seqQ[n_] := 2*EulerPhi[n] < n; primQ[n_] := seqQ[n] && AllTrue[Most@Divisors[n], ! seqQ[#] &]; Select[Range[500], primQ] (* Amiram Eldar, Feb 29 2020 *) CROSSREFS Cf. A054741, A119433. Sequence in context: A072978 A055163 A342192 * A207574 A278972 A241817 Adjacent sequences:  A119428 A119429 A119430 * A119432 A119433 A119434 KEYWORD nonn AUTHOR Franklin T. Adams-Watters, May 19 2006 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 June 20 15:16 EDT 2021. Contains 345165 sequences. (Running on oeis4.)