A050620 - OEIS

%I #14 Jun 17 2020 16:42:25

%S 2,11,43,209,1042,6771,26823,130599,651237,3255306,21158903,83821639,

%T 408121757,2035115566,13224589033,52388661704,331370112102,

%U 1691563962301,6567827879588,41430886596044,211450306579272,1059399469695886,5298071316879193,20530429091056784

%N Quotients arising from sequence A035014.

%H Ray Chandler, <a href="/A050620/b050620.txt">Table of n, a(n) for n = 1..1431</a> (terms < 10^1000, first 1000 terms from Alois P. Heinz)

%F a(n) = a(n-1)/2 + 5^(n-1)*(4-[a(n-1) mod 2])/2. - Antonio G. Astudillo (afg_astudillo(AT)hotmail.com), Jun 17 2001

%F a(n) = A035014(n)/2^n. - _Michel Marcus_, Apr 07 2017

%o (PARI) a(n) = if (n==1, 2, a(n-1)/2 + 5^(n-1)*(4-(a(n-1) % 2))/2);

%Y Cf. A023402, A035014.

%K nonn,base

%O 1,1

%A _Patrick De Geest_, Jun 15 1999

%E More terms from Antonio G. Astudillo (afg_astudillo(AT)hotmail.com), Jun 17 2001

%E More terms from _Michel Marcus_, Apr 07 2017