a(n) is the least k for which omega(k)*omega(k + 1) = n where omega = A001221.
A391216
a(n) is the least k for which omega(k)*omega(k + 1) = n where omega = A001221.
Terms
- a(0) =1a(1) =2a(2) =5a(3) =29a(4) =14a(5) =2309a(6) =65a(7) =570569a(8) =209a(9) =230a(10) =3569a(11) =239378649509a(12) =714a(14) =510509a(15) =10010a(16) =7314a(18) =53130
External references
- oeis: A391216