Positions of +4's in A346242.

Terms

a(0) =20a(1) =936a(2) =1224a(3) =1250a(4) =1368a(5) =1656a(6) =2088a(7) =2232a(8) =2664a(9) =2952a(10) =3096a(11) =3384a(12) =3816a(13) =4248a(14) =4392a(15) =4824a(16) =5112a(17) =5256a(18) =5688a(19) =5976a(20) =6408a(21) =6984a(22) =7272a(23) =7416a(24) =7704a(25) =7848a(26) =8136a(27) =9144a(28) =9432a(29) =9864