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%I #5 Oct 30 2013 11:52:17
%S 0,0,0,1,0,1,2,3,4,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,0,1,
%T 2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,
%U 27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44
%N After the first zero, integers from 0 to A219661(n)-1 followed by integers from 0 to A219661(n+1)-1, etc.
%F a(0) = a(1) = 0, and for n > 1, a(n) = n - A219665(A230411(n+1)-1).
%o (Scheme)
%o (define (A230431 n) (if (< n 2) 0 (- n (A219665 (-1+ (A230411 (+ n 1)))))))
%Y Cf. A219661, A219665, A230411. Used to compute A230432.
%Y Analogous sequence for binary system: A218601.
%K nonn
%O 0,7
%A _Antti Karttunen_, Oct 22 2013