A037919 - OEIS

%I #12 Jun 15 2022 13:15:47

%S 4,2,2,2,11,211

%N Trajectory of 4 under prime factor concatenation procedure.

%H Patrick De Geest, <a href="http://www.worldofnumbers.com/topic1.htm">Home Primes</a>

%e May be regarded as the rows of an irregular triangle:

%e 4

%e 2 2

%e 2 11

%e 211. - _N. J. A. Sloane_, Jun 15 2022

%Y Cf. A037273.

%K fini,full,nonn,tabf,base

%O 0,1

%A _Jeff Burch_

%E Edited by _Charles R Greathouse IV_, Apr 30 2010