|
A144123
|
|
(0, 1, 2, 3, 2^2, 5, 2*3, 7, 2^3, 3^2, 2*5, 11, 2^2*3, 13,..) becomes (4, 6, 8, 9, 10^12, 14, 15*16, 18, 20^21, 22^24, 25*26, 27, 28^30*32, 33, ..).
|
|
0
|
|
|
%I #4 Mar 30 2012 18:52:27
%S 4,6,8,9,1000000000000,14,240,18,2097152000000000000000000000,
%T 165251092644282265779977014214656,650,27,
%U 831554883865300668552224606420411230629920768,33,1190,1368
%N (0, 1, 2, 3, 2^2, 5, 2*3, 7, 2^3, 3^2, 2*5, 11, 2^2*3, 13,..) becomes (4, 6, 8, 9, 10^12, 14, 15*16, 18, 20^21, 22^24, 25*26, 27, 28^30*32, 33, ..).
%e 10^12=1000000000000=a(5).
%e 14=a(6).
%e 15*16=240=a(7).
%e 20^21=2097152000000000000000000000,
%e etc.
%Y Cf. A002808, A136740, A136811, A143716.
%K nonn
%O 1,1
%A _Juri-Stepan Gerasimov_, Nov 17 2008
%E Corrected (18 inserted) and extended by _R. J. Mathar_, Apr 28 2010
|
