Coefficients of a polynomial used in calculation of A055913.

Terms

a(0) =1a(1) =6a(2) =19a(3) =65a(4) =164a(5) =358a(6) =763a(7) =1377a(8) =2474a(9) =3936a(10) =6181a(11) =8979a(12) =12546a(13) =16753a(14) =21422a(15) =26258a(16) =31321a(17) =34969a(18) =39772a(19) =40007a(20) =44030a(21) =39493a(22) =42663a(23) =33716a(24) =36011a(25) =24891a(26) =26363a(27) =15853a(28) =16467a(29) =8717