A275687 Difference between the smallest 10^n-digit member of a sexy prime quadruple and 10^(10^n - 1), or 0 if no such 10^n-digit number exists.

0, 9561, 70495851, 465621162291

Offset

0,2

Links

Table of n, a(n) for n=0..3.

Formula

Conjecture: a(n) = A133449(10^(n-1)) for n >= 1. - Jason Yuen, Mar 07 2025

Example

a(0) = 0 because (5, 11, 17, 23, 29) is a sexy prime 5-tuple and this is the only sexy prime 5-tuple.
a(1) = 9561 because 10^9+9561 is the smallest 10-digit member of a sexy prime quadruple. The quadruple is (10^9+9561, 10^9+9567, 10^9+9573, 10^9+9579).

Crossrefs

Cf. A023201, A023271, A133449.

Sequence in context: A254022 A254889 A133449 * A210409 A250761 A038825

Adjacent sequences: A275684 A275685 A275686 * A275688 A275689 A275690

Keyword

nonn,base,hard,more,changed

Author

Arkadiusz Wesolowski, Aug 05 2016

Status

approved