|
| |
|
|
A071411
|
|
"Sum of n first primes" minus "sum of first n nonprimes".
|
|
2
| |
|
|
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
(list; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 1,4
|
|
|
FORMULA
| a(n) = A007504(n) - A051349(n). Cf. A024850.
|
|
|
PROG
| (PARI) for(n=1, 100, s=2; while(sum(i=1, s, 1-isprime(i))<n, s++); print1(-sum(k=1, s, (1-is prime(k))*k)+sum(k=1, n, prime(k)), ", "))
|
|
|
CROSSREFS
| Sequence in context: A020826 A094346 A074104 * A121065 A077928 A105418
Adjacent sequences: A071408 A071409 A071410 * A071412 A071413 A071414
|
|
|
KEYWORD
| easy,sign
|
|
|
AUTHOR
| Benoit Cloitre (benoit7848c(AT)orange.fr), Jun 23 2002
|
|
|
EXTENSIONS
| Corrected and edited by Jaroslav Krizek (jaroslav.krizek(AT)atlas.cz), Jun 17 2009
|
| |
|
|
