A280418 Length of shortest prefix of the characteristic sequence of the primes A010051 that contains all possible length-n blocks appearing in that sequence.

0, 2, 9, 11, 27, 29, 95, 97, 121, 151, 152, 215, 216, 1613, 1614, 2341, 2342, 5483, 5484, 18061, 18062, 29401, 29402

Offset

0,2

Links

Table of n, a(n) for n=0..22.

Example

For n = 2 the prefix 011010100 of length 9 contains all 4 blocks, and it is the shortest such prefix.

Crossrefs

Cf. A010051, A280417.

Sequence in context: A081613 A115911 A065596 * A042053 A134775 A042573

Adjacent sequences: A280415 A280416 A280417 * A280419 A280420 A280421

Keyword

nonn,more

Author

Jeffrey Shallit, Jan 02 2017

Status

approved