%I A094960
%S A094960 1,2,4,6,10,12,28,30,36,60
%N A094960 Numbers n such that the derivative of n-th Bernoulli polynomial B(n,x) 
               contains only integer coefficients.
%C A094960 Next term if it exists is > 1000. - Emeric Deutsch (deutsch(AT)duke.poly.edu), 
               Feb 28 2005
%e A094960 B(6,x)= x^6 - 3*x^5 + (5/2)*x^4 - (1/2)*x^2 + 1/42 so B'(6,x) contains 
               only integer coefficients and 6 is in the sequence.
%p A094960 p:=proc(n) if denom(diff(bernoulli(n,x),x))=1 then n else fi end:seq(p(n), 
               n=1..100); (Deutsch)
%Y A094960 Sequence in context: A045963 A128169 A095923 this_sequence A032396 A087148 
               A153817
%Y A094960 Adjacent sequences: A094957 A094958 A094959 this_sequence A094961 A094962 
               A094963
%K A094960 more,nonn
%O A094960 1,2
%A A094960 Benoit Cloitre (benoit7848c(AT)orange.fr), Jun 19 2004