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 A278530 #6 Dec 12 2016 09:12:03 %S A278530 0,1,2,3,3,5,5,6,4,8,8,10,7,11,9,10,5,12,12,16,11,18,15,17,9,18,16,20, %T A278530 12,19,14,15,6,17,17,24,16,28,23,27,14,29,26,33,20,32,24,26,11,27,25, %U A278530 34,21,36,28,32,15,31,26,33,18,29,20,21,7,23,23,34,22,41,33,40,20,44,39,51,30,50,37,41,17,43,40,55,34,59,46,53,25,52,44,56,31,50,35 %N A278530 a(n) = A056239(A260443(n)). %H A278530 Antti Karttunen, <a href="/A278530/b278530.txt">Table of n, a(n) for n = 0..8191</a> %F A278530 a(n) = A056239(A260443(n)). %o A278530 (Scheme) %o A278530 (define (A278530 n) (sum_A000027_times_elements_in (A260443as_coeff_list n))) %o A278530 (define (sum_A000027_times_elements_in nums) (let loop ((s 0) (nums nums) (i 1)) (cond ((null? nums) s) (else (loop (+ s (* (car nums) i)) (cdr nums) (+ 1 i)))))) %o A278530 ;; Other code as in A260443. %Y A278530 Cf. A056239, A260443. %Y A278530 Cf. also A276081. %K A278530 nonn %O A278530 0,3 %A A278530 _Antti Karttunen_, Dec 11 2016