A330362 a(n) is the least number that starts an arithmetic progression of n consecutive lucky numbers.

1, 1, 37, 87, 87, 72979

Offset: 1

Author

Amiram Eldar, Dec 12 2019

Keywords

• nonn
• more

Comments

The difference is 6 in the arithmetic progressions that correspond to a(3)-a(6).

Calculated using Hugo van der Sanden's Lucky numbers up to 10^9 (private communication).

a(7) > 999999990, if it exists.

a(7) > 4*10^9, if it exists. - Giovanni Resta, May 10 2020

Examples

			a(3) = 37 since {37, 43, 49} = {37, 37 + 6, 37 + 2*6} are the least 3 consecutive lucky numbers in an arithmetic progression.
		

Crossrefs

Cf. A000959, A006560.

Extensions

Name edited by Petros Hadjicostas, Jun 06 2020