cp's OEIS Frontend

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.

Showing 1-5 of 5 results.

A286513 Array read by antidiagonals: T(m,n) is the number of independent sets in the stacked prism graph C_m X P_n.

Original entry on oeis.org

1, 1, 3, 1, 7, 4, 1, 17, 13, 7, 1, 41, 43, 35, 11, 1, 99, 142, 181, 81, 18, 1, 239, 469, 933, 621, 199, 29, 1, 577, 1549, 4811, 4741, 2309, 477, 47, 1, 1393, 5116, 24807, 36211, 26660, 8303, 1155, 76, 1, 3363, 16897, 127913, 276561, 307983, 143697, 30277, 2785, 123
Offset: 1

Views

Author

Andrew Howroyd, May 10 2017

Keywords

Comments

Equivalently, the number of vertex covers in the stacked prism graph C_m X P_n.

Examples

			Table starts:
=============================================================
m\n|   1    2     3      4        5         6           7
---|---------------------------------------------------------
1  |   1    1     1      1        1         1           1 ...
2  |   3    7    17     41       99       239         577 ...
3  |   4   13    43    142      469      1549        5116 ...
4  |   7   35   181    933     4811     24807      127913 ...
5  |  11   81   621   4741    36211    276561     2112241 ...
6  |  18  199  2309  26660   307983   3557711    41097664 ...
7  |  29  477  8303 143697  2488431  43089985   746156517 ...
8  |  47 1155 30277 788453 20546803 535404487 13951571713 ...
...
		

Crossrefs

Rows 3..8 are A003688(n+1), A051926, A181989, A181961, A182014, A182019.
Columns 1..4 are A000032, A051927, A050400, A050401.
Main diagonal is A212270.
Cf. A089934 (P_m X P_n), A027683, A286514.

A286914 Number of dominating sets in the stacked prism graph C_n X P_n.

Original entry on oeis.org

1, 11, 383, 38437, 15179657, 23213149395, 135207176568283, 3008600384479080345, 255856229024918222966821, 83138455533359719800266401039, 103225590675437292878209927396154515, 489730115155632619934278544711183719808829
Offset: 1

Views

Author

Andrew Howroyd, May 15 2017

Keywords

Crossrefs

Main diagonal of A286514.

A285880 Number of dominating sets in the stacked prism graph C_3 X P_n.

Original entry on oeis.org

7, 51, 383, 2865, 21449, 160579, 1202181, 9000177, 67380199, 504444655, 3776545835, 28273267057, 211668986689, 1584668649559, 11863687582089, 88817989227329, 664939560807015, 4978097605819019, 37268734233506311, 279013924866426465
Offset: 1

Views

Author

Andrew Howroyd, May 15 2017

Keywords

Crossrefs

Row 3 of A286514.

Formula

Empirical: a(n) = 7*a(n-1)+3*a(n-2)+5*a(n-3)-a(n-4)-3*a(n-5)-a(n-6)-a(n-7) for n>7.
Empirical G.f.: x*(7+2*x+5*x^2-4*x^3 -3*x^4-2*x^5-x^6)/(1-7*x-3*x^2-5*x^3 +x^4+3*x^5+x^6+x^7).

A375603 Array read by antidiagonals: T(m,n) = domination number of the stacked prism graph C_m X P_n.

Original entry on oeis.org

1, 1, 1, 1, 2, 1, 2, 2, 2, 2, 2, 3, 3, 2, 2, 2, 3, 4, 3, 3, 2, 3, 4, 4, 4, 4, 4, 3, 3, 4, 5, 5, 6, 5, 4, 3, 3, 5, 6, 6, 7, 6, 6, 4, 3, 4, 5, 7, 7, 8, 8, 7, 6, 5, 4, 4, 6, 7, 8, 9, 9, 9, 8, 7, 6, 4, 4, 6, 8, 9, 10, 10, 11, 10, 10, 8, 6, 4, 5, 7, 9, 10, 11, 12, 12, 12, 12, 10, 9, 6, 5
Offset: 1

Views

Author

Stephan Mertens, Aug 20 2024

Keywords

Examples

			Table starts:
====================================
m\n |   1   2   3    4    5    6 ...
----|-------------------------------
  1 |   1   1   1    2    2    2 ...
  2 |   1   2   2    3    3    4 ...
  3 |   1   2   3    4    4    5 ...
  4 |   2   2   3    4    5    6 ...
  5 |   2   3   4    6    7    8 ...
  6 |   2   4   5    6    8    9 ...
 ...
		

Crossrefs

Main diagonal is A375601.

A375566 Array read by antidiagonals: T(m,n) = number of minimum dominating sets in the stacked prism graph C_m X P_n.

Original entry on oeis.org

1, 2, 2, 1, 6, 3, 4, 3, 9, 6, 3, 12, 34, 4, 5, 1, 2, 123, 4, 10, 3, 8, 17, 3, 16, 5, 51, 14, 4, 2, 18, 28, 290, 18, 14, 8, 1, 20, 93, 76, 320, 6, 63, 4, 3, 13, 2, 438, 164, 265, 171, 14, 4, 18, 25, 5, 24, 3, 396, 255, 36, 91, 24, 9, 120, 11, 1, 2, 27, 904, 250, 6, 1526, 60, 2052, 25, 22, 3
Offset: 1

Views

Author

Stephan Mertens, Aug 19 2024

Keywords

Examples

			Table starts:
====================================
m\n |   1   2   3    4    5    6 ...
----+-------------------------------
  1 |   1   2   1    4    3    1 ...
  2 |   2   6   3   12    2   17 ...
  3 |   3   9  34  123    3   18 ...
  4 |   6   4   4   16   28   76 ...
  5 |   5  10   5  290  320  265 ...
 ...
		

Crossrefs

Main diagonal is A375569.
Rows 1..2 are A347633, A347558.
Column 1 is A347538, column 2 is essentially A347634.
Showing 1-5 of 5 results.