Least k such that k * M(n) * M(n+1) + 1 is prime where M(n) = A000668(n).

Terms

a(0) =2a(1) =6a(2) =4a(3) =16a(4) =36a(5) =6a(6) =42a(7) =24a(8) =172a(9) =18a(10) =52a(11) =54a(12) =6a(13) =130a(14) =2488a(15) =1344a(16) =12420a(17) =5596a(18) =364a(19) =178a(20) =3382a(21) =10516a(22) =44328a(23) =30342a(24) =25770a(25) =47146