Eighth column of quintinomial coefficients.

Terms

a(0) =2a(1) =18a(2) =80a(3) =255a(4) =666a(5) =1520a(6) =3144a(7) =6030a(8) =10890a(9) =18722a(10) =30888a(11) =49205a(12) =76050a(13) =114480a(14) =168368a(15) =242556a(16) =343026a(17) =477090a(18) =653600a(19) =883179a(20) =1178474a(21) =1554432a(22) =2028600a(23) =2621450a(24) =3356730a(25) =4261842a(26) =5368248