A087357 - OEIS

%I #12 Nov 10 2024 02:41:54

%S 1,3,2,13,6,11,4,5,10,35,16,25,26,19,12,501,2594,1219

%N Index of powers of 2 arising as the difference of a pair of successive terms of A087356.

%C Conjecture: Every number is a member.

%C a(17) > 2500. - _David Wasserman_, May 12 2005

%C a(19) > 20000 if it exists. - _Robert Israel_, Dec 24 2015

%F a(n) = Log to the base 2 of {A087356(n+1) - A087356(n)}.

%e a(5) = log to the base 2 of {A087356(6) - A087356(5)} = log{8209-17} = log (8192) to the base 2 = 13.

%Y Cf. A087356.

%K nonn,more

%O 1,2

%A _Amarnath Murthy_, Sep 08 2003

%E More terms from _David Wasserman_, May 12 2005

%E a(17) and a(18) from _Robert Israel_, Dec 24 2015