The OEIS mourns the passing of Jim Simons and is grateful to the Simons Foundation for its support of research in many branches of science, including the OEIS.
The OEIS is supported by the many generous donors to the OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A094666 Composite NSW numbers. 0
 1393, 8119, 47321, 275807, 1607521, 54608393, 318281039, 1855077841, 10812186007, 367296043199, 2140758220993, 12477253282759, 72722761475561, 423859315570607, 2470433131948081, 14398739476117879, 83922003724759193 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Table of n, a(n) for n=1..17. J. A. Sellers, Infinitely Many Composite NSW Numbers: An Inductive Proof J. A. Sellers and H. Williams, On the Infinitude of Composite NSW Numbers MATHEMATICA a[0] = 1; a[1] = 7; a[n_] := a[n] = 6a[n - 1] - a[n - 2]; a /@ Select[ Range[23], !PrimeQ[ a[ # ]] &] (* Robert G. Wilson v, Jun 09 2004 *) nxt[{a_, b_}]:={b, 6b-a}; Select[NestList[nxt, {1, 7}, 30][[;; , 1]], CompositeQ] (* Harvey P. Dale, Mar 11 2023 *) CROSSREFS Cf. A002315, A088165. Sequence in context: A202050 A236520 A235657 * A163043 A069366 A163054 Adjacent sequences: A094663 A094664 A094665 * A094667 A094668 A094669 KEYWORD nonn AUTHOR Lekraj Beedassy, Jun 07 2004 EXTENSIONS More terms from Robert G. Wilson v, Jun 09 2004 STATUS approved

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

Last modified June 15 13:08 EDT 2024. Contains 373407 sequences. (Running on oeis4.)