Number of pairs of antipodal vertices in the level n>1 Sierpiński triangle graph.

A370933

Number of pairs of antipodal vertices in the level n>1 Sierpiński triangle graph.

Terms

    a(0) =6a(1) =15a(2) =42a(3) =132a(4) =456a(5) =1680a(6) =6432a(7) =25152a(8) =99456a(9) =395520a(10) =1577472a(11) =6300672a(12) =25184256a(13) =100700160a(14) =402726912a(15) =1610760192a(16) =6442745856a(17) =25770393600a(18) =103080394752a(19) =412319219712

External references