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 A165676 #8 Jun 02 2025 02:04:57 %S A165676 50,154,342,638,1066,1650,2414,3382,4578,6026,7750,9774,12122,14818, %T A165676 17886,21350,25234,29562,34358,39646,45450,51794,58702,66198,74306, %U A165676 83050,92454,102542,113338,124866,137150,150214,164082,178778 %N A165676 Fourth right hand column of triangle A165674. %C A165676 The recurrence relation leads to Pascal's triangle A007318, the a(n) formula to Wiggen's triangle A028421 and the o.g.f to Wood's polynomials A126671; see A165674. %H A165676 <a href="/index/Rec#order_04">Index entries for linear recurrences with constant coefficients</a>, signature (4,-6,4,-1). %F A165676 a(n) = 4*a(n-1) - 6*a(n-2) + 4*a(n-3) - a(n-4) %F A165676 a(n) = 6 + 22*n + 18*n^2 + 4*n^3 %F A165676 Gf(z) = (0*z^5 - 6*z^4 + 26*z^3 - 46*z^2 + 50*z)/(z-1)^4 %Y A165676 Cf. A165674, A007318, A028421, A126671. %K A165676 easy,nonn %O A165676 1,1 %A A165676 _Johannes W. Meijer_, Oct 05 2009