A129079 Prime numbers that are the sum of consecutive prime numbers with the final digit 7 (primes in A030432).

7, 61, 379, 643, 967, 2549, 9547, 19531, 45121, 70199, 78467, 127637, 150373, 156257, 175069, 195311, 209459, 246709, 286999, 295513, 312931, 330859, 349207, 378239, 398357, 518191, 553733, 765287, 779731, 838927, 853981, 1166597

Offset: 1

Author

Tomas Xordan, May 11 2007

Keywords

• easy
• base
• nonn

Examples

			a(6)=2549 because 2549=A030432(1)+ A030432(2)+A030432(3)+A030432(4)+ A030431(5)+A030432(6)+A030432(7)+ A030432(8)+A030432(9)+A030432(10)+A030432(11)+A030432(12)+A030432(13)+A030432(14)+A030432(15)+A030432(16)+A030432(17)= 7+ 17+ 37+ 47+ 67+ 97+ 107+ 127+ 137+ 157+ 167+ 197+ 227+ 257+ 277+ 307+ 317; and 2549 is a prime number.
		

Crossrefs

Cf. A030432; A000040.

Formula

a(n)=A030432(1)+A030432(2)+...+A030432(x); a is a prime number.