A162706 Numbers that are the sum of two reversed primes.

4, 5, 6, 7, 8, 9, 10, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81

Offset

1,1

Links

Table of n, a(n) for n=1..71.

Formula

a(n) = A004087(j)+A004087(k) for any pair (j,k). - R. J. Mathar, Jul 13 2009

Crossrefs

Sequence in context: A039128 A214421 A294237 * A088331 A239433 A014091

Adjacent sequences: A162703 A162704 A162705 * A162707 A162708 A162709

Keyword

nonn,base,less

Author

Claudio Meller, Jul 11 2009

Extensions

Edited, entries checked by R. J. Mathar, Jul 13 2009

Status

approved