A306750 Least prime of exactly n consecutive primes all of which are regular.

61, 137, 239, 41, 2447, 71, 4271, 3331, 3701, 3, 15193, 10253, 163, 107053, 51343, 1185313, 584557, 491299, 2696021, 4042523, 10872649, 6806243, 8738641, 6925999, 17669539, 120490499, 17881, 14906383, 211144489, 510669881, 126276229, 1913754191

Offset: 1

Author

Amiram Eldar, Mar 07 2019

Keywords

• nonn
• more

Comments

Calculated from the list of primes by Hart et al.

Examples

			a(1) = 61 since it is regular and both its neighboring primes 59 and 67 are irregular.
		

Links

• William Hart, David Harvey and Wilson Ong, Irregular primes to two billion, Mathematics of Computation, Vol. 86, No. 308 (2017), pp. 3031-3049; also available at arXiv:1605.02398 [math.NT], 2016.
• David Harvey, Irregular primes to two billion (includes a list of all primes less than 2^31).

Crossrefs

Cf. A007703, A000928, A105019.