A135384 - OEIS

%I #12 Jun 08 2024 15:44:40

%S 642,2164,2534,2592,3425,6421,9225,10642,11642,12642,13642,14642,

%T 15642,16642,17642,18642,19642,20642,21636,21641,22348,22633,22928,

%U 23344,23629,23924,24336,24342,24922,25329,25333,25341,25919,25921,30642,31634,32259

%N Numbers which converge to 2592 under repeated application of the powertrain map of A133500.

%C Many of these numbers reach 2592 in one step. Examples of numbers which take more than one step are 45756, 52648, 63724, 64528, 72634, 75456.

%H N. J. A. Sloane, <a href="/A135384/b135384.txt">Table of n, a(n) for n = 1..169</a>

%o (Python) # aupto in A326735

%o print(aupto(32259, target=2592)) # _Michael S. Branicky_, Feb 21 2021

%Y Cf. A133500, A135385.

%K nonn,base

%O 1,1

%A _J. H. Conway_ and _N. J. A. Sloane_, Dec 10 2007