Annual Appeal: Please make a donation (tax deductible in USA) to keep the OEIS running. Over 4500 articles have referenced us, often saying "we would not have discovered this result without the OEIS".
Table of n, a(n) for n=1..58.
a(n) = A000720(A030432(n)). - Ray Chandler, Nov 07 2006
Select[Range, Mod[Prime[ # ], 10] == 7 &] (* Ray Chandler, Nov 07 2006 *)
Cf. A000720, A030432, A102342.
Sequence in context: A085048 A024813 A244741 * A026360 A237514 A047535
Adjacent sequences: A049506 A049507 A049508 * A049510 A049511 A049512
N. J. A. Sloane.
Extended by Ray Chandler, Nov 07 2006