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A121297 For definition see Comments lines. 0

%I

%S 11,14,21,39,78,211,1954,63163,17163259,316235916142,

%T 7475840758734855197,77068358083998565749275388634420,

%U 56080446471298599543571746837309517827424625680076701163

%N For definition see Comments lines.

%C Using N_b to denote "N read in base b", the sequence is

%C ......11....11.....11.....11.......etc.

%C ..............13.....13.....13.........

%C .......................17.....17.......

%C ................................19.....

%C where the subscripts are evaluated from the top downwards.

%C Analog of A121265 using primes >= 11.

%D David Applegate, Marc LeBrun and N. J. A. Sloane, Descending Dungeons and Iterated Base-Changing, in "The Mathematics of Preference, Choice and Order: Essays in Honor of Peter Fishburn", edited by Steven Brams, William V. Gehrlein and Fred S. Roberts, Springer, 2009, pp. 393-402.

%H David Applegate, Marc LeBrun and N. J. A. Sloane, <a href="https://arxiv.org/abs/math/0611293">Descending Dungeons and Iterated Base-Changing</a>, arXiv:math/0611293 [math.NT], 2006-2007.

%H David Applegate, Marc LeBrun and N. J. A. Sloane, <a href="https://www.jstor.org/stable/40391135">Descending Dungeons, Problem 11286</a>, Amer. Math. Monthly, 116 (2009) 466-467.

%p asubb := proc(a,b) local t1; t1:=convert(a,base,10); add(t1[j]*b^(j-1),j=1..nops(t1)): end;

%p t1:=[10]; for n from 1 to 12 do t2:=f(t1[n],ithprime(n+5)); t1:=[op(t1),t2]; od: t1;

%Y Cf. A121263, A121265, A121295, A121296.

%K nonn,base

%O 10,1

%A _N. J. A. Sloane_, Aug 25 2006

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Last modified June 15 04:47 EDT 2021. Contains 345043 sequences. (Running on oeis4.)