Numbers whose base-7 representation contains exactly four 2's.

Terms

a(0) =800a(1) =3201a(2) =4916a(3) =5259a(4) =5504a(5) =5553a(6) =5588a(7) =5595a(8) =5600a(9) =5601a(10) =5603a(11) =5604a(12) =5605a(13) =5606a(14) =5609a(15) =5616a(16) =5623a(17) =5630a(18) =5651a(19) =5700a(20) =5749a(21) =5798a(22) =5945a(23) =6288a(24) =6631a(25) =6974a(26) =8003a(27) =10404a(28) =12805a(29) =15206