login
Powers of 7 with initial digit 1.
3

%I #8 Oct 22 2018 12:40:54

%S 1,16807,117649,1977326743,13841287201,1628413597910449,

%T 11398895185373143,191581231380566414401,1341068619663964900807,

%U 157775382034845806615042743,1104427674243920646305299201

%N Powers of 7 with initial digit 1.

%H Muniru A Asiru, <a href="/A067493/b067493.txt">Table of n, a(n) for n = 1..357</a>

%o (GAP) Filtered(List([0..40],n->7^n),i->ListOfDigits(i)[1]=1); # _Muniru A Asiru_, Oct 22 2018

%Y Cf. A067480, A067481, A067482, A067483, A067484, A067485, A067486, A067487, A067488, A067489, A067490, A067491, A067492.

%K base,easy,nonn

%O 1,2

%A _Amarnath Murthy_, Feb 09 2002

%E Offset 1 by _Michel Marcus_, Oct 19 2018