1,1

This sequence is A074200 + 1. See that entry for more information and further terms. - N. J. A. Sloane, May 04 2009

It is obvious that this sequence is increasing and each term is prime. If n>3 then a(n)==1 (mod 10).

a(9)=363500177041 because all the nine numbers 363500177041,

(363500177041+1)/2, (363500177041+2)/3, (363500177041+3)/4,

(363500177041+4)/5, (363500177041+5)/6, (363500177041+6)/7,

(363500177041+7)/8 and (363500177041+8)/9 are primes and

363500177041 is the smallest number m such that (m+k-1)/k is prime for k=1,2,...,9.

Cf. A072875.

Sequence in context: A160858 A062648 A094003 this_sequence A027673 A119616 A056435

Adjacent sequences: A093550 A093551 A093552 this_sequence A093554 A093555 A093556

more,nonn

Farideh Firoozbakht (mymontain(AT)yahoo.com), Apr 14 2004