%N Minimal number of factorials which add to 0+1+2+...+n; a(n) = A034968(A000217(n)).
%C 1's occur at positions n=1, n=3 and n=15 as they are such natural numbers that A000217(n) is also one of the factorial numbers (A000142), as we have A000217(1) = 1 = 1!, A000217(3) = 1+2+3 = 6 = 3! and A000217(15) = 1 + 2 + ... + 15 = 120 = 5!
%C On the other hand, a(2)=2, as A000217(2) = 1+2 = 3 = 2! + 1!. Is this the only occurrence of 2?
%C Are some numbers guaranteed to occur an infinite number of times?
%H Antti Karttunen, <a href="/A232095/b232095.txt">Table of n, a(n) for n = 0..10000</a>
%F a(n) = A034968(A000217(n)).
%F a(n) = A231717(A226061(n+1)). [Not a practical way to compute this sequence. Please see comments at A231717]
%F For all n, a(n) >= A232094(n).
%o (define (A232095 n) (A034968 (A000217 n)))
%Y Cf. A232094, A232096.
%A _Antti Karttunen_, Nov 18 2013