OFFSET
1,1
REFERENCES
M. Cerasoli, F. Eugeni and M. Protasi, Elementi di Matematica Discreta, Bologna 1988.
Emanuele Munarini and Norma Zagaglia Salvi, Matematica Discreta,UTET, CittaStudiEdizioni, Milano 1997.
LINKS
Harvey P. Dale, Table of n, a(n) for n = 1..1000
FORMULA
a(n) = A087915(n) + 5.
MATHEMATICA
tn7Q[n_]:=Module[{c=2n-7}, PrimeQ[c]&&Divisible[c-3, 4]]; Select[Range[ 5, 301, 2], tn7Q] (* Harvey P. Dale, May 18 2021 *)
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Giovanni Teofilatto, Dec 08 2003
EXTENSIONS
Offset corrected by Arkadiusz Wesolowski, Aug 09 2011
Corrected and extended by Harvey P. Dale, May 18 2021
STATUS
approved