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A038487 Sums of two distinct powers of 9. 4

%I #31 Aug 25 2023 18:54:32

%S 10,82,90,730,738,810,6562,6570,6642,7290,59050,59058,59130,59778,

%T 65610,531442,531450,531522,532170,538002,590490,4782970,4782978,

%U 4783050,4783698,4789530,4842018,5314410,43046722,43046730,43046802,43047450,43053282

%N Sums of two distinct powers of 9.

%H Robert Israel, <a href="/A038487/b038487.txt">Table of n, a(n) for n = 1..10001</a>

%F a(n)=9^A002024(n)+9^A002262(n). - _M. F. Hasler_, Aug 31 2014

%p N:= 10^10: # to get all terms <= N

%p {seq(seq(9^a+9^b,b=0..a-1),a=1..floor(log[9](N)))}; # _Robert Israel_, Aug 31 2014

%t Total/@Subsets[9^Range[0,10],{2}]//Union (* _Harvey P. Dale_, Aug 25 2023 *)

%o (PARI) for(a=0,19,for(b=0,a-1,print1(9^a+9^b,","))) \\ _M. F. Hasler_, Aug 31 2014

%Y Base 9 interpretation of A038444.

%K nonn,easy

%O 1,1

%A _Olivier GĂ©rard_

%E More terms from _Vincenzo Librandi_, Aug 06 2009

%E Corrected by _Harvey P. Dale_, Aug 31 2014

%E Offset changed from 0 to 1 by _M. F. Hasler_, Aug 31 2014

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Last modified March 29 09:59 EDT 2024. Contains 371268 sequences. (Running on oeis4.)