A000040|A014686

[Alexander Povolotsky]

so what ?

On Fri, Apr 25, 2008 at 6:31 PM, Eric <moongerms at wanadoo.fr> wrote:
> A000040 The prime numbers
>  [2,3,5,7,11,13,17,19,23,29,31,37,41,43,47,53,59,
>   61,67,71,73,79,83,89,97,101,103,107,109,113,127,
>   131,137,139,149,151,157,163,167,173,179,181,191,
>   193,197,199,211,223,227,229,233,239,241,251,257,
>   263,269,271]
>
>  A014686
>  In sequence of prime numbers add 1 to first prime, 3rd prime, fifth prime,
>  ... then subtract 1 from 2nd prime, fourth prime, sixth prime and so on.
>  [3,2,6,6,12,12,18,18,24,28,32,36,42,42,48,52,60,
>   60,68,70,74,78,84,88,98,100,104,106,110,112,128,
>   130,138,138,150,150,158,162,168,172,180,180,192,
>   192,198,198,212,222,228,228,234,238,242,250,258,
>   262,270,270]
>
>  sumA014686 = sumA000040 = 7141
>  (n<=58)
>
>
>  1 3 5 7 9  11 13 15 17 19 21 23 ...144
>  2 2 6 6 10 10 14 14 18 18 22 22 ...144
>
>  2 4 6 8 10 12 14 16 18 20 22 24 ...156
>  3 3 7 7 11 11 15 15 19 19 23 23 ...156
>
>  2,3,5,7,11,13,17,19,23,29,31,37 ...197
>  3,2,6,6,12,12,18,18,24,28,32,36 ...197
>
>  1 2 3 4  5  6  7  8  9 10 11 12 ... 78
>  2 1 4 3  6  5  8  7 10  9 12 11 ... 78
>
>
>  A109722  Sum of first 2n primes.
>  0, 5, 17, 41, 77, 129, 197, 281, 381, 501, 639, 791, 963, 1161, 1371, 1593,
>  1851, 2127, 2427, 2747, 3087, 3447, 3831, 4227, 4661, 5117, 5589, 6081,
>  6601, 7141, 7699, 8275, 8893, 9523, 10191, 10887, 11599, 12339, 13101,
>  13887, 14697, 15537, 16401, 17283
>
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