A234019 - OEIS

%I #5 Jan 16 2014 15:02:30

%S 0,-1,0,1,2,4,6,19,38,67,127,234,419,745,1378,2678,5311,10470,20333

%N Maximum values occurring in each row of A233270: a(n) = A233270(A233268(n) - A234020(n)).

%C Please see the graph of A233270.

%F a(n) = A233270(A233268(n) - A234020(n)).

%o (Scheme, with _Antti Karttunen_'s IntSeq-library)

%o (define (A234019 n) (A233270 (- (A233268 n) (A234020 n))))

%o ;; Alternative version:

%o (define (A234019v2 n) (A233270 (A234019pos (- n 1))))

%o (define A234019pos (RECORD-ABSVALS-BETWEEN-ZEROS-POS 0 A233270 A213710))

%Y Cf. A233268, A233270, A234018, A234020.

%K sign

%O 1,5

%A _Antti Karttunen_, Dec 29 2013