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Sort then Add, a(1)=7.
1

%I #11 Feb 03 2025 05:37:13

%S 7,14,28,56,112,224,448,896,1585,3143,4477,8954,13543,26888,53776,

%T 89453,124042,136286,259954,505553,541108,552566,808132,820520,822778,

%U 1050566,1066132,1178498,2326387,4560065,4605631,4740197,4884976,9352865

%N Sort then Add, a(1)=7.

%e 1585 --> 1558 (sorted) and adding them gives 1585+1558 = 3143.

%p A033895 := proc(n)

%p option remember ;

%p if n =1 then

%p 7;

%p else

%p A070196(procname(n-1)) ;

%p end if;

%p end proc:

%p seq(A033895(n),n=1..100) ; # _R. J. Mathar_, Feb 03 2025

%Y Cf. A033860.

%K nonn,base,easy

%O 1,1

%A _N. J. A. Sloane_, _David W. Wilson_