A078299 Numbers which can be expressed as the sum of two distinct primes in exactly four ways.

36, 42, 50, 74, 80, 82, 86, 88, 92, 94, 152, 158

Offset

1,1

Links

Table of n, a(n) for n=1..12.

Example

36 is a term as 36 = 31 + 5 = 29 + 7 = 23 + 13 = 19 + 17 are only the four ways to express 36 as a sum of two distinct primes.

Crossrefs

Cf. A077914 (2 ways), A077969 (3 ways), A080854 (5 ways), A080862 (6 ways).

Sequence in context: A261372 A044862 A162526 * A225028 A239802 A266242

Adjacent sequences: A078296 A078297 A078298 * A078300 A078301 A078302

Keyword

nonn

Author

Shyam Sunder Gupta, Mar 29 2003

Status

approved