Denominators of Harary index for the n-permutation star graph.

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =1a(7) =1a(8) =11a(9) =143a(10) =13a(11) =13a(12) =17a(13) =19a(14) =323a(15) =323a(16) =437a(17) =437a(18) =23a(19) =1a(20) =667a(21) =20677a(22) =899a(23) =31a(24) =899a(25) =33263a(26) =33263a(27) =33263a(28) =47027a(29) =2022161