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Powers of 7 with strictly increasing sum of digits.
2

%I #6 Mar 29 2024 19:01:49

%S 1,7,49,16807,117649,5764801,282475249,1977326743,96889010407,

%T 678223072849,4747561509943,1628413597910449,11398895185373143,

%U 558545864083284007,3909821048582988049,9387480337647754305649,459986536544739960976801

%N Powers of 7 with strictly increasing sum of digits.

%Y Cf. A069027, A069028, A069029, A069030, A069031.

%K nonn,base

%O 1,2

%A _Amarnath Murthy_, Apr 02 2002

%E More terms from Larry Reeves (larryr(AT)acm.org), Jun 26 2002

%E More terms from _Harvey P. Dale_, Jan 22 2016