a(n) is the smallest nonnegative integer such that a(n)! contains a string of exactly n consecutive 6's.

A254501

a(n) is the smallest nonnegative integer such that a(n)! contains a string of exactly n consecutive 6's.

Terms

    a(0) =0a(1) =3a(2) =20a(3) =38a(4) =35a(5) =213a(6) =1122a(7) =3415a(8) =10214a(9) =32430a(10) =145197a(11) =351679a(12) =666779a(13) =813843a(14) =3765934

External references