Clique covering number of the n-Sierpinski tetrahedron graph.

Terms

a(0) =1a(1) =4a(2) =11a(3) =41a(4) =161a(5) =641a(6) =2561a(7) =10241a(8) =40961a(9) =163841a(10) =655361a(11) =2621441a(12) =10485761a(13) =41943041a(14) =167772161a(15) =671088641a(16) =2684354561a(17) =10737418241a(18) =42949672961a(19) =171798691841a(20) =687194767361