Position of n-th 6 in A007376.

Terms

a(0) =6a(1) =23a(2) =43a(3) =63a(4) =83a(5) =103a(6) =110a(7) =112a(8) =114a(9) =116a(10) =118a(11) =120a(12) =122a(13) =123a(14) =124a(15) =126a(16) =128a(17) =143a(18) =163a(19) =183a(20) =210a(21) =240a(22) =270a(23) =300a(24) =330a(25) =360a(26) =371a(27) =374a(28) =377a(29) =380