a(1) = 6, a(n) = concatenation of two closest divisors of a(n-1) whose product equals a(n-1) or if a(n-1) is a prime then the concatenation of 1 and a(n-1).
A063383
a(1) = 6, a(n) = concatenation of two closest divisors of a(n-1) whose product equals a(n-1) or if a(n-1) is a prime then the concatenation of 1 and a(n-1).
Terms
- a(0) =6a(1) =23a(2) =123a(3) =341a(4) =1131a(5) =2939a(6) =12939a(7) =57227a(8) =89643a(9) =329881a(10) =1073083a(11) =1197553a(12) =7171079a(13) =17171079a(14) =57301247a(15) =208327509a(16) =1171780577a(17) =1219684137a(18) =1478297171a(19) =2587571433a(20) =2795835979a(21) =8663322733a(22) =13666409441a(23) =113666409441
External references
- oeis: A063383