Westminster chimes at 15-minute intervals (1).

Terms

a(0) =1a(1) =2a(2) =3a(3) =5a(4) =1a(5) =2a(6) =3a(7) =6a(8) =1a(9) =2a(10) =3a(11) =7a(12) =1a(13) =2a(14) =3a(15) =8a(16) =1a(17) =2a(18) =3a(19) =9a(20) =1a(21) =2a(22) =3a(23) =10a(24) =1a(25) =2a(26) =3a(27) =11a(28) =1a(29) =2