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

1,1

Links

Table of n, a(n) for n=1..32.

Formula

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

Example

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.

Sequence in context: A289723 A064398 A275878 * A249556 A135165 A218805

Adjacent sequences: A129076 A129077 A129078 * A129080 A129081 A129082

Keyword

easy,base,nonn

Author

Tomas Xordan, May 11 2007

Status

approved