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 A379530 #18 Dec 31 2024 06:35:37
%S A379530 1,3,8,23,64,185,512,1479,4096,11833,32768,94663,262144,757305,
%T A379530 2097152,6058439,16777216,48467513,134217728,387740103,1073741824,
%U A379530 3101920825,8589934592,24815366599,68719476736,198522932793,549755813888,1588183462343,4398046511104,12705467698745
%N A379530 a(n) = (A135318(3*n) + A135318(3*n+1) + A135318(3*n+2))/3.
%H A379530 <a href="/index/Rec#order_04">Index entries for linear recurrences with constant coefficients</a>, signature (0,7,0,8).
%F A379530 a(n) = 7*a(n-2) + 8*a(n-4) with a(0)=1, a(1)=3, a(2)=8, a(3)=23 for n >= 4.
%F A379530 a(2*n) = A001018(n).
%F A379530 a(2*n+1) = A015565(n+1) + A013730(n).
%t A379530 LinearRecurrence[{0, 7, 0, 8}, {1, 3, 8, 23}, 30] (* _Amiram Eldar_, Dec 31 2024 *)
%Y A379530 Cf. A001018, A013730, A015565, A135318.
%K A379530 nonn,easy
%O A379530 0,2
%A A379530 _Paul Curtz_, Dec 24 2024