Number of 6 X 6 binary matrices with n ones, distinct up to cyclic shifts of rows and/or columns; reflection through any vertical or horizontal axis; and reflection through the main diagonal. Also number of quasi-n-ominoes on a torus divided into a 6 X 6 grid.
A093469
Number of 6 X 6 binary matrices with n ones, distinct up to cyclic shifts of rows and/or columns; reflection through any vertical or horizontal axis; and reflection through the main diagonal. Also number of quasi-n-ominoes on a torus divided into a 6 X 6 grid.
Terms
- a(0) =1a(1) =1a(2) =9a(3) =40a(4) =282a(5) =1455a(6) =7278a(7) =29849a(8) =107399a(9) =330369a(10) =890152a(11) =2096153a(12) =4364470a(13) =8045195a(14) =13215574a(15) =19368689a(16) =25423509a(17) =29898089a(18) =31566122a(19) =29898089a(20) =25423509a(21) =19368689a(22) =13215574a(23) =8045195a(24) =4364470a(25) =2096153a(26) =890152a(27) =330369a(28) =107399a(29) =29849
External references
- oeis: A093469