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 A139227 #6 Jul 14 2012 13:52:01 %S A139227 1,1,1,1,2,4,1,1,3,7,1,2,17,1,5,11,1,1,2,3,4,6,8,9,12,16,18,24,36,48, %T A139227 72,1,1,13,29,1,2,5,10,61,122,305,1,3,7,21,47,141,329,1,1,2,4,8,17,19, %U A139227 34,38,68,76,136,152,323,646,1292 %N A139227 Array read by rows: row n lists the proper divisors of n-th Fibonacci number A000045(n). %e A139227 Row ....... Array begins %e A139227 =========================================================== %e A139227 3 ......... 1 %e A139227 4 ......... 1 %e A139227 5 ......... 1 %e A139227 6 ......... 1, 2, 4 %e A139227 7 ......... 1 %e A139227 8 ......... 1, 3, 7 %e A139227 9 ......... 1, 2, 17 %e A139227 10 ........ 1, 5, 11 %e A139227 11 ........ 1 %e A139227 12 ........ 1, 2, 3, 4, 6, 8, 9, 12, 16, 18, 24, 36, 48, 72 %e A139227 13 ........ 1 %t A139227 f[n_] := Most@ Divisors@ Fibonacci@ n; Flatten@ Array[f, 16, 3] (* _Robert G. Wilson v_ *) %Y A139227 Cf. A000045, A133021, A139044, A139045. %K A139227 easy,nonn,tabl %O A139227 3,5 %A A139227 _Omar E. Pol_, Apr 28 2008