OFFSET
1,1
EXAMPLE
a(2)=22 + (2+11) = 35 + (5+7) = ending prime 47. Between 22 and 47 one finds 6 primes 23, 29, 31, 37, 41 and 43.
CROSSREFS
KEYWORD
nonn
AUTHOR
Patrick De Geest, Sep 15 1999
EXTENSIONS
Offset corrected by Sean A. Irvine, Aug 18 2021
STATUS
approved