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Search: id:A071411
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| A071411 |
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"Sum of n first primes" minus "sum of first n nonprimes". |
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+0
3
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| 1, 0, -1, -2, 0, 3, 8, 13, 21, 34, 47, 64, 84, 105, 128, 156, 189, 223, 262, 303, 344, 390, 439, 49, 3, 554, 617, 681, 748, 815, 884, 966, 1051, 1140, 1230, 1329, 1429, 1534, 1643, 1755, 1872, 1, 994, 2117, 2248, 2379, 2513, 2648, 2794, 2951, 3110, 3270, 3433, 3600, 3767, 3943, 4124, 43, 10, 4501, 4692, 4888
(list; graph; listen)
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OFFSET
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1,4
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FORMULA
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a(n) = A051349(n) - A007504(n). Cf. A024850.
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PROGRAM
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(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)), ", "))
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CROSSREFS
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Sequence in context: A020826 A094346 A074104 this_sequence A121065 A077928 A105418
Adjacent sequences: A071408 A071409 A071410 this_sequence A071412 A071413 A071414
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KEYWORD
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easy,sign
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AUTHOR
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Benoit Cloitre (benoit7848c(AT)orange.fr), Jun 23 2002
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