A237267 The positions of records in A236747.

1, 2, 5, 105, 585, 1041, 1590, 3582, 5460, 19425, 21450, 21540, 33495, 42315, 101745, 122265, 151710, 176190, 252525, 267435, 318780, 343800, 464100, 542640, 868140, 996765, 1080450, 1217370, 1322685, 1461495, 1477875, 1601985, 2523675, 2792790, 3512145

Offset

1,2

Comments

Smallest k such that A236747(k) = n: 1, 2, 5, 105, 585, 1041, 1590, 3582, 6870, 5460,...

Smallest prime p such that A236747(p) = n: 2, 5, 593, 1889, 4457,...

Links

Table of n, a(n) for n=1..35.

Crossrefs

Cf. A236747 (number of 0 <= k <= sqrt(n) such that n-k and n+k are both prime).

Sequence in context: A276110 A136106 A122696 * A266284 A215572 A023263

Adjacent sequences: A237264 A237265 A237266 * A237268 A237269 A237270

Keyword

nonn

Author

Antti Karttunen and Juri-Stepan Gerasimov, Feb 05 2014

Extensions

a(7)-a(9) from Michel Marcus, Feb 05 2014.

a(9)-a(35) from Giovanni Resta, Feb 09 2014

Status

approved