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A109820 Column 9 of array illustrated in A089574 and related to A034261.

%I A109820 #5 Aug 28 2018 09:52:35
%S A109820 6,126,992,4921,18450,57198,154420,375106,838075,1749221,3449895,
%T A109820 6485363,11699374,20362113,34340211,56319046,90089305,140911696,
%U A109820 215975810,324971445,480793226,700402096,1005870222,1425639066,1996023823,2763001135,3784320961,5131987727,6895160406,9183525995,12131205973
%N A109820 Column 9 of array illustrated in A089574 and related to A034261.
%H A109820 <a href="/index/Rec#order_11">Index entries for linear recurrences with constant coefficients</a>, signature (11,-55,165,-330,462,-462,330,-165,55,-11,1).
%F A109820 G.f. 6 -x*( 126 -394*x +939*x^2 -1911*x^3 +2803*x^4 -2825*x^5 +1964*x^6 -939*x^7 +298*x^8 -57*x^9 +5*x^10)/(x-1)^11 . - _R. J. Mathar_, Aug 28 2018
%e A109820 The associated sequences begin for n = 15 through 19:
%e A109820 ........................1.......5
%e A109820 ........................3.......18
%e A109820 ................3.......18......60
%e A109820 ........3.......18......60......150
%e A109820 1.......7.......25......65......140
%e A109820 ........................6.......42
%e A109820 ................12......84......324
%e A109820 ........12......84......324.....924
%e A109820 ........6.......42......162.....462
%e A109820 4.......32......132.....392.....952
%e A109820 ........................10......80
%e A109820 ................30......240.....1050
%e A109820 ........10......90......420.....1400
%e A109820 ........30......240.....1050....3360
%e A109820 1.......11......56......196.....546
%e A109820 ........................15......135
%e A109820 ................60......540.....2640
%e A109820 ........15......165.....900.....3420
%e A109820 ........................21......210
%e A109820 ................35......385.....2205
%e A109820 ........................28......308
%e A109820 ........................1.......19
%e A109820 therefore this sequence begins
%e A109820 6 126 992 4921 18450
%Y A109820 Cf. A109126.
%Y A109820 Cf. A000330 (column 2), A086602 (column 3), A089574 (column 4), A107600 (column 5), A107601 (column 6), A109125 (column 7), A109126 (column 8), A109820 (column 9), A108538 (column 10), A109821 (column 11), A110553 (column 12), A110624 (column 13).
%K A109820 easy,nonn
%O A109820 0,1
%A A109820 _Alford Arnold_, Jul 03 2005
%E A109820 More terms with the program of A105552 from _R. J. Mathar_, Aug 28 2018