A340558 a(n) is the smallest prime that can be the apex of a triangle with n rows, all entries being distinct primes, and all row sums equal.

2, 19, 53, 131, 269, 503, 853, 1361, 1999, 2879, 3989

Offset: 1

Author

Michel Marcus, Jan 11 2021

Keywords

• nonn
• more

Comments

A109724(n) is a lower bound for the sum of terms of triangle.

Examples

			            19
For n=2: 3  5  11 , so a(2) = 19.
		

Links

• Carlos Rivera, Puzzle 1026. Another pine-like-prime puzzle, Prime Puzzles and Problems Connection.

Crossrefs

Cf. A047837, A109724.