1,1

Table of n, a(n) for n=1..8.

Index entries for sequences related to numbers of primes in various ranges

a(1)=5 since the 10th prime is 29 and the first 5 twin primes are {3,5}, {5,7}, {11,13}, {17,19} and {29,31}.

See A093683 for another version.

Sequence in context: A035341 A258369 A137383 * A047897 A204461 A121144

Adjacent sequences: A049032 A049033 A049034 * A049036 A049037 A049038

nonn

Dennis S. Kluk (mathemagician(AT)ameritech.net)

More terms from Labos Elemer, Oct 13 2000; Jud McCranie, Dec 30 2000

approved