Common differences of arithmetic progressions in A086786.

Terms

a(0) =1a(1) =2a(2) =6a(3) =6a(4) =30a(5) =4a(6) =72a(7) =72a(8) =210a(9) =132a(10) =132a(11) =114a(12) =594a(13) =48a(14) =354a(15) =1860a(16) =3942a(17) =2574a(18) =2574a(19) =2574a(20) =20910a(21) =20910a(22) =9600a(23) =9600