The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A004171

(Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
Showing entries 1-10 | older changes

A004171

a(n) = 2^(2n+1).
(history; published version)

#131 by Michael De Vlieger at Tue Dec 19 17:45:01 EST 2023

STATUS

reviewed

approved

#130 by Michel Marcus at Tue Dec 19 17:44:01 EST 2023

STATUS

proposed

reviewed

#129 by Michael De Vlieger at Tue Dec 19 16:54:05 EST 2023

STATUS

editing

proposed

#128 by Michael De Vlieger at Tue Dec 19 16:54:03 EST 2023

LINKS

Ling Gao, <a href="http://hdl.handle.net/20.500.12680/h989rb533">Graph assembly for spider and tadpole graphs</a>, Master's Thesis, Cal. State Poly. Univ. (2023).

STATUS

approved

editing

#127 by Michel Marcus at Mon May 08 02:24:50 EDT 2023

STATUS

reviewed

approved

#126 by Joerg Arndt at Mon May 08 02:01:49 EDT 2023

STATUS

proposed

reviewed

#125 by Amiram Eldar at Mon May 08 01:29:27 EDT 2023

STATUS

editing

proposed

#124 by Amiram Eldar at Mon May 08 00:49:19 EDT 2023

LINKS

<a href="/index/Di#divseq">Index to divisibility sequences</a>.

#123 by Amiram Eldar at Mon May 08 00:48:57 EDT 2023

LINKS

Milan Janjic, <a href="httphttps://wwwpmf.pmfblunibl.org/janjicwp-content/uploads/2017/10/enumfun.pdf">Enumerative Formulas for Some Functions on Finite Sets</a>.

Tanya Khovanova, <a href="http://www.tanyakhovanova.com/RecursiveSequences/RecursiveSequences.html">Recursive Sequences</a>.

Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/MaximalClique.html">Maximal Clique</a>.

Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/SierpinskiTetrahedronGraph.html">Sierpinski Tetrahedron Graph</a>.

<a href="/index/Di#divseq">Index to divisibility sequences</a>.

#122 by Amiram Eldar at Mon May 08 00:47:48 EDT 2023

FORMULA

Product_{n>=0} (1 - 1/a(n)) = A132020. - Amiram Eldar, May 08 2023

CROSSREFS

Cf. A132020, A164632. Equals A000980(n) + 2*A181765(n). Cf. A013776.

STATUS

approved

editing