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 A274281 #4 Jun 18 2016 00:39:39 %S A274281 1,2,3,4,6,7,8,11,12,14,18,21,22,24,28,29,33,36,42,44,47,54,56,58,66, %T A274281 72,76,77,84,87,88,94,108,116,123,126,132,141,144,152,154,168,174,188, %U A274281 198,199,203,216,228,231,232,246,252,264,282,304,308,319,322 %N A274281 Numbers that are a product of distinct Lucas numbers (2,1,3,4,7,11,...) %C A274281 See the Comment on distinct-product sequences in A160009. %H A274281 Clark Kimberling, <a href="/A274281/b274281.txt">Table of n, a(n) for n = 1..1000</a> %e A274281 The Lucas numbers are 2,1,3,4,7,11,18,29,..., so that the sequence of all products of distinct Lucas numbers, in increasing order, are 1, 2, 3, 4, 6, 7, 8, 11, 12, 14, 18, 21, 22, 24, 28, 29,... %t A274281 f[1] = 2; f[2] = 1; z = 32; f[n_] := f[n - 1] + f[n - 2]; f = Table[f[n], {n, 1, z}]; f %t A274281 s = {1}; Do[s = Union[s, Select[s*f[[i]], # <= f[[z]] &]], {i, z}]; s %Y A274281 Cf. A160009, A274280. %K A274281 nonn,easy %O A274281 1,2 %A A274281 _Clark Kimberling_, Jun 17 2016