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Powers of 9 with initial digit 9.
9

%I #16 Sep 08 2022 08:45:05

%S 9,984770902183611232881,969773729787523602876821942164080815560161,

%T 955004950796825236893190701774414011919935138974343129836853841,

%U 940461086986004843694934910131056317906479029659199959555574885740211572136210345921

%N Powers of 9 with initial digit 9.

%H Muniru A Asiru, <a href="/A067487/b067487.txt">Table of n, a(n) for n = 1..48</a>

%t Select[9^Range[100], First[IntegerDigits[#]]==9 &] (* _Vincenzo Librandi_, Oct 22 2018 *)

%o (GAP) Filtered(List([0..100],n->9^n),i->ListOfDigits(i)[1]=9); # _Muniru A Asiru_, Oct 21 2018

%o (Magma) [9^n: n in [1..100] | Intseq(9^n)[#Intseq(9^n)] eq 9]; // _Vincenzo Librandi_, Oct 22 2018

%Y Cf. A067480, A067481, A067482, A067483, A067484, A067485, A067486.

%K base,easy,nonn

%O 1,1

%A _Amarnath Murthy_, Feb 09 2002

%E More terms from _Benoit Cloitre_, Feb 28 2002