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Powers of 5 with initial digit 1.
5

%I #9 Oct 21 2018 17:06:36

%S 1,125,15625,1953125,1220703125,152587890625,19073486328125,

%T 11920928955078125,1490116119384765625,186264514923095703125,

%U 116415321826934814453125,14551915228366851806640625,1818989403545856475830078125,1136868377216160297393798828125

%N Powers of 5 with initial digit 1.

%H Muniru A Asiru, <a href="/A067491/b067491.txt">Table of n, a(n) for n = 1..300</a>

%p select(x-> "1"=""||x[1], [5^n$n=0..50])[]; # _Alois P. Heinz_, Oct 21 2018

%o (GAP) Filtered(List([0..40],n->5^n),i->ListOfDigits(i)[1]=1); # _Muniru A Asiru_, Oct 21 2018

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

%K base,easy,nonn

%O 1,2

%A _Amarnath Murthy_, Feb 09 2002

%E Offset 1 from _Michel Marcus_, Oct 19 2018