For a positive number k, let L(k) denote the list consisting of k followed by the prime factors of k, with repetition, in nondecreasing order; sequence gives k such that the digits of L(k) are in nondecreasing order.

A372055

For a positive number k, let L(k) denote the list consisting of k followed by the prime factors of k, with repetition, in nondecreasing order; sequence gives k such that the digits of L(k) are in nondecreasing order.

Terms

    a(0) =1a(1) =2a(2) =3a(3) =5a(4) =7a(5) =11a(6) =12a(7) =25a(8) =35a(9) =111a(10) =112a(11) =125a(12) =222a(13) =245a(14) =333a(15) =335a(16) =445a(17) =1225a(18) =2225a(19) =11125a(20) =33445a(21) =334445a(22) =3333335a(23) =3334445a(24) =3444445a(25) =33333445a(26) =333333335a(27) =334444445a(28) =3333333335a(29) =33333334445

External references