Third row of Pascal-(1,6,1) array A081581.

Terms

a(0) =1a(1) =15a(2) =78a(3) =190a(4) =351a(5) =561a(6) =820a(7) =1128a(8) =1485a(9) =1891a(10) =2346a(11) =2850a(12) =3403a(13) =4005a(14) =4656a(15) =5356a(16) =6105a(17) =6903a(18) =7750a(19) =8646a(20) =9591a(21) =10585a(22) =11628a(23) =12720a(24) =13861a(25) =15051a(26) =16290a(27) =17578a(28) =18915a(29) =20301