A177943 Locations of records in A177942.

1, 3, 4, 9, 11, 13, 20, 33, 42, 49, 84, 86, 107, 109, 123, 128, 191, 295, 296, 318, 330, 337, 396, 453, 481, 616, 663, 771, 882, 1105, 1180, 1257, 1431, 1659, 1856, 1936, 2130, 2370, 2584, 2651, 2790, 2959, 3009, 3080, 3121, 3189, 3503, 3639, 3879, 3902, 3961

Offset

1,2

Comments

Also: indices m for which A177941(m)-2 and A177941(m)+2 are cousin primes (A023200).

Links

Table of n, a(n) for n=1..51.

Prog

(PARI) listai(nn) = {my(va = vector(nn), rec = 0, ind = 1); va[1] = 5; for (n=2, nn, p = factor(va[n-1]^2-4)[1, 1]; if (p > rec, print1(n-1, ", "); rec = p); va[n] = va[n-1] + p - 1; ); } \\ Michel Marcus, Dec 14 2018

Crossrefs

Cf. A177941, A177942, A023200, A177929, A177930, A177931, A177945

Sequence in context: A035252 A227939 A047459 * A091380 A321871 A050006

Adjacent sequences: A177940 A177941 A177942 * A177944 A177945 A177946

Keyword

nonn

Author

Vladimir Shevelev, May 15 2010

Extensions

1 inserted, a(10) corrected and sequence extended by R. J. Mathar, Jun 30 2010

More terms from Michel Marcus, Dec 14 2018

Status

approved