A274825 Gaps associated with the arithmetic progressions in A278735.

0, 2, 6, 78, 8640, 1155000, 82419540

Offset: 1

Author

Bobby Jacobs, Dec 08 2016

Keywords

• nonn
• hard
• more

Comments

The first set of 4 prime-indexed primes in arithmetic progression (353, 431, 509, and 587) contains consecutive terms of A142160.

Examples

			a(4) = 78 because 353 = prime(prime(20)), 431 = prime(prime(23)), 509 = prime(prime(25)), 587 = prime(prime(28)), and 431-353 = 509-431 = 587-509 = 78.
For the corresponding arithmetic progressions, see _Charles R Greathouse IV_'s example in A278735. - _Bobby Jacobs_, Jan 02 2017
		

Crossrefs

Cf. A006450, A093364, A142160, A278735, A279021, A279062.

Extensions

a(7) from Bobby Jacobs, Jan 02 2017