login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A331442 Length of n-th chain in A331440. 2

%I

%S 5,8,10,9,11,11,11,11,8,11,11,11,11,11,11,11,11,11,11,11,11,11,20,16,

%T 41,31,28,28,31,54,21,9,36,11,24,23,32,10,37,42,12,27,46,16,40,27,6,

%U 19,45,13,42,42,37,61,37,98,93,18,44,33,19,59,35,54,166,131

%N Length of n-th chain in A331440.

%H Lars Blomberg, <a href="/A331442/b331442.txt">Table of n, a(n) for n = 1..3000</a>

%H Rémy Sigrist, <a href="/A331442/a331442.gp.txt">PARI program for A331442</a>

%e When starting chain 9, A331440(77) is set to the first free number which is 17, and the chain becomes 17, 34, 68, 136, 272, 544, 1088, 2176 with length 8.

%o (PARI) See Links section.

%Y Cf. A331440, A331441.

%K nonn,base

%O 1,1

%A _N. J. A. Sloane_, Jan 22 2020

%E Corrected a(9) and more terms from _Lars Blomberg_, Jan 22 2020

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.

License Agreements, Terms of Use, Privacy Policy. .

Last modified May 23 08:14 EDT 2022. Contains 353961 sequences. (Running on oeis4.)