The permanent of the distance matrix of the rooted tree having Matula number n.

Terms

a(0) =0a(1) =1a(2) =4a(3) =4a(4) =64a(5) =64a(6) =36a(7) =36a(8) =1152a(9) =1152a(10) =1152a(11) =656a(12) =656a(13) =656a(14) =34372a(15) =352a(16) =656a(17) =15236a(18) =352a(19) =19856a(20) =19856a(21) =34372a(22) =15236a(23) =8272a(24) =1335008a(25) =15236a(26) =413904a(27) =11028a(28) =19856a(29) =573408