This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A283992 #11 Mar 20 2017 23:21:39 %S A283992 0,1,2,2,3,3,4,4,4,4,5,5,6,6,6,6,7,7,8,8,8,8,9,9,10,10,10,10,11,11,12, %T A283992 12,12,12,12,12,13,13,13,13,14,14,15,15,15,15,16,16,16,16,16,16,17,17, %U A283992 18,18,18,18,19,19,20,20,20,20,21,21,22,22,22,22,23,23,24,24,24,24,25,25,26,26,26,26,27,27,27,27,27,27,28,28,29,29,29,29,30,30 %N A283992 a(n) = number of irreducible Stern polynomials in range B(1,x) .. B(n,x). (Polynomial B_1(x) = 1 is not included in the count). %C A283992 Compare a(65537) = 19681 to A000720(65537) = 6543. %H A283992 Antti Karttunen, <a href="/A283992/b283992.txt">Table of n, a(n) for n = 1..10001</a> %F A283992 a(1) = 0, and for n > 1, a(n) = A283991(n) + a(n-1). %o A283992 (Scheme) (definec (A283992 n) (if (= 1 n) 0 (+ (A283991 n) (A283992 (- n 1))))) %Y A283992 Partial sums of A283991. Cf. A186891, A125184, A260443, A283993, A283994. %Y A283992 Differs from A000720 for the first time at n=25, as here a(25) = 10. %Y A283992 Differs from A255574 for the first time at n=65, as here a(65) = 21. %K A283992 nonn %O A283992 1,3 %A A283992 _Antti Karttunen_, Mar 20 2017