A226977 -id:A226977 - cp's OEIS frontend

A227010 Places n where A225867(n) = 4.

10, 14, 15, 18, 20, 21, 25, 26, 27, 28, 35, 36, 37, 39, 40, 42, 49, 50, 52, 56, 63, 64, 65, 67, 72, 74, 79, 80, 84, 91, 96, 100, 101, 104, 109, 111, 112, 125, 127, 128, 144, 168, 181, 185, 192, 200, 211, 224, 256, 269, 281, 288, 293, 307, 336, 353, 379

Offset: 1

Vladimir Shevelev, Jun 27 2013

nonn

Note that the proportion of prime terms has a tendency to increase. For example,

1 from the first 20 terms; 6 from the first 40 terms; 16 from the first 60 terms; 34 from the first 80 terms; 53 from the first 100 terms; 90 from the first 140 terms. We conjecture that this proportion asymptotically tends to 1.

Cf. A225867, A225868, A226977.

A226727 Places n where A225867(n)=5.

Original entry on oeis.org

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

Vladimir Shevelev, Jun 29 2013

nonn

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.

Cf. A225867, A225868, A226977, A227010.

cp's OEIS Frontend

A227010 Places n where A225867(n) = 4.

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