Differences of A038013.

Terms

a(0) =3060a(1) =840a(2) =1500a(3) =300a(4) =1860a(5) =60a(6) =210a(7) =570a(8) =2040a(9) =300a(10) =240a(11) =1200a(12) =1320a(13) =160a(14) =620a(15) =420a(16) =660a(17) =840a(18) =100a(19) =20a(20) =1020a(21) =240a(22) =360a(23) =60a(24) =60a(25) =480a(26) =840a(27) =1560a(28) =420a(29) =1320