A283832 First differences of A280774.

1, 2, 3, 4, 3, 10, 4, 3, 4, 4, 10, 6, 8, 3, 4, 17, 4, 4, 9, 17, 7, 4, 4, 4, 5, 4, 13, 4, 20, 12, 14, 44, 3, 4, 13, 11, 4, 10, 11, 8, 11, 4, 16, 4, 4, 9, 8, 4, 20, 15, 6, 7, 16, 4, 6, 4, 8, 21, 14, 4, 26, 4, 15, 6, 4, 6, 12, 28, 23, 20, 10, 10, 52, 12

Offset

1,2

Comments

Let s(m) = A280864(m). The sequence gives the lengths of successive segments when A280864 is split after any term s(m) where every prime divisor of s(m) has already divided s(m-1). (Then s(m+1) is the smallest number not yet in A280864 which is relatively prime to s(m).)

See the link "Properties of A280864" in A280864 for more information.

Links

N. J. A. Sloane, Table of n, a(n) for n = 1..25317

Crossrefs

Cf. A280864, A280774.

Sequence in context: A339663 A211507 A295368 * A102086 A009184 A009716

Adjacent sequences: A283829 A283830 A283831 * A283833 A283834 A283835

Keyword

nonn

Author

N. J. A. Sloane, Mar 22 2017, following a posting to the Sequence Fans Mailing List by Hugo van der Sanden

Status

approved