Starts of runs of 3 consecutive anti-tau numbers (A046642).

Terms

a(0) =3a(1) =15a(2) =195a(3) =255a(4) =483a(5) =783a(6) =1023a(7) =1155a(8) =1295a(9) =1443a(10) =1599a(11) =2703a(12) =3363a(13) =4623a(14) =4899a(15) =5183a(16) =6399a(17) =6723a(18) =7395a(19) =7743a(20) =8463a(21) =8835a(22) =10815a(23) =11235a(24) =11663a(25) =12099a(26) =12543a(27) =15375a(28) =16383a(29) =16899