A071411 "Sum of n first primes" minus "sum of first n nonprimes".

1, 0, -1, -2, 0, 3, 8, 13, 21, 34, 47, 64, 84, 105, 128, 156, 189, 223, 262, 303, 344, 390, 439, 493, 554, 617, 681, 748, 815, 884, 966, 1051, 1140, 1230, 1329, 1429, 1534, 1643, 1755, 1872, 1994, 2117, 2248, 2379, 2513, 2648, 2794, 2951, 3110, 3270, 3433, 3600, 3767, 3943, 4124, 4310, 4501, 4692, 4888

Offset: 1

Author

Benoit Cloitre, Jun 23 2002

Keywords

• easy
• sign

Programs

PARI

for(n=1, 100, s=2; while(sum(i=1, s, 1-isprime(i))
				

Formula

a(n) = A007504(n) - A051349(n). Cf. A024850.

Partial sums of A014237.

Extensions

Corrected and edited by Jaroslav Krizek, Jun 17 2009