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 A005372 M2628 #28 Nov 15 2022 02:41:42 %S A005372 3,7,11,47,322,9349,1860498,10749957122,12360848946698171, %T A005372 82123488809519507169850807, %U A005372 627376215338105766356982006981782561278127,31842547163971605907183271059340725709462269514762215168643703957079 %N A005372 a(n) = L(L(n+1)+1), where L(n) are Lucas numbers A000032. %D A005372 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence). %H A005372 Alois P. Heinz, <a href="/A005372/b005372.txt">Table of n, a(n) for n = 0..16</a> %p A005372 L:= n-> (<<0|1>, <1|1>>^(n). <<2,1>>)[1,1]: %p A005372 a:= n-> L(L(n+1)+1): %p A005372 seq(a(n), n=0..12); # _Alois P. Heinz_, Jun 01 2016 %t A005372 LucasL[1 +LucasL[Range[16]]] (* _G. C. Greubel_, Nov 14 2022 *) %o A005372 (Magma) [Lucas(1+Lucas(n+1)): n in [0..15]]; // _G. C. Greubel_, Nov 14 2022 %o A005372 (SageMath) [lucas_number2(1+lucas_number2(n+1, 1,-1),1,-1) for n in range(15)] # _G. C. Greubel_, Nov 14 2022 %Y A005372 Cf. A000032, A005371. %K A005372 nonn %O A005372 0,1 %A A005372 _N. J. A. Sloane_ %E A005372 a(8) onwards corrected by _Sean A. Irvine_, Jun 01 2016 %E A005372 Name edited by _Alois P. Heinz_, Jun 01 2016