Least K such that K*(3^(n+j))+1 is prime for j=0 to 4.

Terms

a(0) =20a(1) =110a(2) =110a(3) =20980a(4) =29580a(5) =9860a(6) =150780a(7) =50260a(8) =217490a(9) =657770a(10) =426650a(11) =1999330a(12) =2942960a(13) =1295490a(14) =431830a(15) =437570a(16) =436450a(17) =7564120a(18) =6449730