a(n) = (a(n-1) + a(n-4))/gcd(a(n-1), a(n-4)) with a(1) = a(2) = a(3) = a(4) = 1.

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =2a(5) =3a(6) =4a(7) =5a(8) =7a(9) =10a(10) =7a(11) =12a(12) =19a(13) =29a(14) =36a(15) =4a(16) =23a(17) =52a(18) =22a(19) =13a(20) =36a(21) =22a(22) =2a(23) =15a(24) =17a(25) =39a(26) =41a(27) =56a(28) =73a(29) =112