|
%I #1 Sep 22 2004 03:00:00
%S 0,3,0,6,3,0,7,6,3,0,8,7,6,3,0,7,8,7,6,3,0,9,7,8,7,6,3,0,4,9,7,8,7,6,
%T 3,0,4,4,9,7,8,7,6,3,0,1,4,4,9,7,8,7,6,3,0,1,1,4,4,9,7,8,7,6,3,0,7,1,
%U 1,4,4,9,7,8,7,6,3,0,1,7,1,1,4,4,9,7,8,7,6,3,0,4,1,7,1,1,4,4,9,7,8,7,6,3,0
%N Triangle of numbers obtained by reversing the first n digits of 1/e and juxtaposing.
%e 0; 3,0; 6,3,0; 7,6,3,0; 8,7,6,3,0;... (reverse order of 0; 0.3; 0.36; 0.367; 0.3678;...)
%o (PARI) a(n)=if(n<1,0,default(realprecision,n+2);floor(exp(-1)*10^(n-1))%10); b(n)=1+binomial(1+floor(1/2+sqrt(2*n)),2)-n; for(n=1,120,print1(a(b(n)),",")
%Y Cf. A068985.
%K base,easy,nonn,tabl
%O 1,2
%A Herman Jamke (hermanjamke(AT)fastmail.fm), Jul 07 2004
|
