A037812 - OEIS

%I #10 Jul 23 2023 15:42:54

%S 0,0,0,0,0,1,1,1,1,0,0,1,1,1,0,0,0,1,1,0,0,0,0,1,1,1,1,1,1,1,2,2,2,2,

%T 1,1,2,2,2,1,1,1,2,2,1,1,1,1,2,1,1,1,1,1,0,1,1,1,1,1,1,2,2,2,1,1,1,2,

%U 2,1,1,1,1,2,1,1,1,1,1,0,1,1,1,1,0,0,1,1,1,1

%N Number of i such that d(i) <= d(i-1), where Sum_{i=0..m} d(i)*5^i is the base-5 representation of n.

%p A037812 := proc(n)

%p     a := 0 ;

%p     dgs := convert(n,base,5);

%p     for i from 2 to nops(dgs) do

%p         if op(i,dgs)<=op(i-1,dgs) then

%p             a := a+1 ;

%p         end if;

%p     end do:

%p     a ;

%p end proc: # _R. J. Mathar_, Oct 16 2015

%Y Cf. A037828.

%K nonn,base

%O 1,31

%A _Clark Kimberling_

%E Sign in Name corrected by _R. J. Mathar_, Oct 16 2015