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%I #6 Nov 09 2015 16:15:10
%S 21,3,8480,1356,18162,149,78495,291,1194707,8567,1426107,4090,6029619,
%T 59748,325034101,95590
%N First differences of A263276; length of n-th run of terms of same parity in A259934.
%F a(n) = A263276(n) - A263276(n-1).
%o (Scheme) (define (A263277 n) (if (zero? n) n (- (A263276 n) (A263276 (- n 1)))))
%Y Cf. A259934, A263276.
%Y Bisections: A263278, A262516.
%K nonn,more
%O 1,1
%A _Antti Karttunen_, Nov 08 2015
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