First differences of A349295.

Terms

a(0) =1a(1) =14a(2) =109a(3) =479a(4) =1570a(5) =4031a(6) =8997a(7) =17948a(8) =32853a(9) =56408a(10) =91776a(11) =143003a(12) =215196a(13) =313732a(14) =444813a(15) =616816a(16) =839685a(17) =1120435a(18) =1472736a(19) =1907995a(20) =2440463a(21) =3086644a(22) =3861599a(23) =4784197a(24) =5878808a(25) =7160841a(26) =8659826a(27) =10399512a(28) =12407231a(29) =14710254