Largest cost for a permutation problem.

Terms

a(0) =0a(1) =2a(2) =7a(3) =17a(4) =35a(5) =62a(6) =100a(7) =152a(8) =219a(9) =303a(10) =406a(11) =530a(12) =678a(13) =851a(14) =1051a(15) =1280a(16) =1540a(17) =1834a(18) =2163a(19) =2529a(20) =2934a(21) =3380a(22) =3869a(23) =4403a(24) =4985a(25) =5616a(26) =6298a(27) =7033a(28) =7823a(29) =8670