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%I #13 Feb 26 2018 04:16:33
%S 3,3,4,8,10,30,33,132,136,680,685,4110,4116,28812,28819,230552,230560,
%T 2075040,2075049,20750490,20750500,228255500,228255511,2739066132,
%U 2739066144,35607859872,35607859885,498510038390,498510038404,7477650576060,7477650576075,119642409217200
%N Multiply by 1, add 1, multiply by 2, add 2, etc.; start with 3.
%o (PARI) A019466(n,a=3)={for(i=2,n+1,if(bittest(i,0),a+=i\2,a*=i\2));a} \\ _M. F. Hasler_, Feb 25 2018
%Y Cf. A082458 (same, but start with 0), A019464 (start with 1), A019465 (start with 2).
%Y Cf. A019460 .. A019463 & A082448 (similar, but first add, then multiply).
%K nonn
%O 0,1
%A _N. J. A. Sloane_
%E Edited by _M. F. Hasler_, Feb 25 2018
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