A109821 Column 11 of array illustrated in A089574 and related to A034261.

27, 482, 3855, 20329, 82346, 277295, 813738, 2145712, 5192450, 11708366, 24881487, 50269005, 97217758, 180966915, 325691821, 568823951, 967074547, 1604701323, 2604691419, 4143692621, 6471712062, 9937820779, 15023357512, 22384420182, 32905773076, 47768686720

Offset

0,1

Links

Georg Fischer, Table of n, a(n) for n = 0..1000

Index entries for linear recurrences with constant coefficients, signature (13,-78,286,-715,1287,-1716,1716,-1287,715,-286,78,-13,1).

Formula

G.f.: 27 + 482*x -x^2*(3855 -29786*x +118759*x^2 -310071*x^3 +574122*x^4 -780978*x^5 +792535*x^6 -601009*x^7 +336759*x^8 -135622*x^9 +37194*x^10 -6228*x^11 +481*x^12) /(x-1)^13. - R. J. Mathar, Aug 28 2018

Example

An examination of the relevant ordered Gaussian polynomials reveals the following distribution (beginning with partitions of length three):
1 10 15 1
6 52 180 216 28
12 114 530 1386 1547 266
18 168 880 3086 7007 7616 1554
therefore (by summing each row) this sequence begins
27
482
3855
20329

Mathematica

LinearRecurrence[{13, -78, 286, -715, 1287, -1716, 1716, -1287, 715, -286, 78, -13, 1}, {27, 482, 3855, 20329, 82346, 277295, 813738, 2145712, 5192450, 11708366, 24881487, 50269005, 97217758, 180966915, 325691821}, 1001] (* Georg Fischer, Feb 28 2019 *)

Crossrefs

Cf. A034261, 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).

Sequence in context: A026028 A026543 A028046 * A057494 A024439 A026006

Adjacent sequences: A109818 A109819 A109820 * A109822 A109823 A109824

Keyword

nonn,changed

Author

Alford Arnold, Jul 18 2005

Extensions

More terms from R. J. Mathar, Aug 28 2018

Status

approved