Fwd: help needed in editing a bunch of submissions
Maximilian Hasler
maximilian.hasler at gmail.com
Mon Jun 16 03:58:55 CEST 2008
the first one:
%I A000001
%S A000001 5, 18, 30, 42, 29, 31, 78, 90, 53, 59, 61, 138, 73, 162, 89, 0, 198,
%T A000001 210, 222, 0, 0, 258, 137, 139, 149, 151, 157, 330, 173,
179, 181, 191,
%U A000001 390, 199, 0, 211, 0, 450, 462, 239, 241, 251, 257, 263,
269, 271, 558,
283, 293, 0, 0, 318, 630, 0, 0, 331, 337, 0, 347, 702
%N A000001 Sum of primes in { 6n-5, 6n-1 }
%F A000001 a(n) = (6n-5) isprime(6n-5) + (6n-1) isprime(6n-1),
where isprime = A010051. - M.F.Hasler, Jun 15 2008
%O A000001 (PARI) a(n)=(6*n-5)*isprime(6*n-5)+(6*n-1)*isprime(6*n-1)
\\ - M.F.Hasler, Jun 15 2008
%C A000001 Original definition of sequence:
A002476: -, 7, 13, 19, -, 31, 37, 43, -, -, 61, 67, 73, 79, -,...
A007528: 5,11,17,23,29. -,41,47, 53, 59, -, 71, -, 83, 89,...
a(n)=sum: 5,18,30,42,29,31,78,91,53,59,61,138,73,162, 89,...
%e A000001 If n =1, then a (1) = A002476(-) + A007528(1) = 0 + 5 = 5
%e A000001 If n =11, then a (11) = A002476(7) + A007528(-) = 61 + 0 = 61
%e A000001 If n =18, then a (18) = A002476(12) + A007528(14) = 103 +107 = 210
%e A000001 If n = 21, then a (21) = A002476(-) + A007528(-) = 0 + 0 = 0
%Y A000001 Cf. A002476, A007528
%K A000001 nonn
%O A000001 1,1
%A A000001 Juri-Stepan Gerasimov (2stepan(AT)rambler.ru), Jun 10 2008
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