A226727 Places n where A225867(n)=5.

30, 43, 45, 60, 61, 73, 75, 90, 97, 120, 137, 151, 160, 169, 173, 180, 197, 240, 241, 257, 259, 311, 320, 331, 347, 360, 367, 389, 400, 421, 480, 491, 499, 569, 571, 601, 617, 640, 641, 647, 709, 720, 773, 800, 809, 857, 881, 919, 929, 947, 960, 971

Offset

1,1

Comments

The proportion of prime terms has a tendency to increase. For example, 4 from the first 10 terms; 10 from the first 20 terms; 16 from the first 30 terms; 24 from the first 40 terms; 40 from the first 60 terms, 88 from the first 110 terms. We conjecture that this proportion asymptotically tends to 1.

Links

Table of n, a(n) for n=1..52.

Crossrefs

Cf. A225867, A225868, A226977, A227010.

Sequence in context: A090692 A196677 A225326 * A102843 A242445 A062385

Adjacent sequences: A226724 A226725 A226726 * A226728 A226729 A226730

Keyword

nonn

Author

Vladimir Shevelev, Jun 29 2013

Status

approved