A338346 1, followed by first differences of A338340.

1, 5, 4, 8, 19, 40, 4, 9, 34, 32, 4, 25, 20, 54, 30, 41, 46, 53, 23, 40, 9, 12, 87, 9, 9, 56, 9, 27, 33, 53, 25, 124, 93, 22, 26, 128, 98, 4, 177, 63, 179, 29, 165, 9, 114, 164, 14, 29, 262, 188, 9, 127, 58, 10, 10, 58, 30, 97, 268, 229, 223, 28, 9, 97, 62, 9, 67, 87, 43, 52

Offset: 1

Author

N. J. A. Sloane, Oct 27 2020

Keywords

• nonn

Comments

A338338 has a natural division into blocks, where the blocks (after the initial 1) start at the primes described in A338339 and A338340. The first few blocks are

[1], [2, 4, 6, 3, 9], [5, 10, 20, 8], [7, 14, 28, 12, 15, 30, 40, 16], [11, 22, 44, 18, ..., 36, 48, 32], [17, ...

and the present sequence gives the lengths of the successive blocks.

Links

• Rémy Sigrist, Table of n, a(n) for n = 1..10000

Crossrefs

Cf. A338338-A338349.