a(n) = a(n-1) # n, where # is addition, subtraction, multiplication if prime(n) == respectively 0, 1, 2 (mod 3).

A154382

a(n) = a(n-1) # n, where # is addition, subtraction, multiplication if prime(n) == respectively 0, 1, 2 (mod 3).

Terms

    a(0) =0a(1) =2a(2) =6a(3) =2a(4) =10a(5) =4a(6) =28a(7) =20a(8) =180a(9) =1800a(10) =1789a(11) =1777a(12) =23101a(13) =23087a(14) =346305a(15) =5540880a(16) =94194960a(17) =94194942a(18) =94194923a(19) =1883898460a(20) =1883898439a(21) =1883898417a(22) =43329663591

External references