First differences of A151776.

Terms

a(0) =1a(1) =12a(2) =12a(3) =84a(4) =12a(5) =84a(6) =180a(7) =420a(8) =12a(9) =84a(10) =180a(11) =564a(12) =540a(13) =420a(14) =1116a(15) =2028a(16) =108a(17) =84a(18) =180a(19) =564a(20) =540a(21) =564a(22) =1500a(23) =3276a(24) =1836a(25) =420a(26) =1116a(27) =2940a(28) =4380a(29) =2724