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A110343 a(1) = 1, a(n) = sum of n successive primes beginning with n if n is prime otherwise a(n) = sum of n successive composite numbers beginning with n. 0

%I #4 Dec 05 2013 19:57:01

%S 1,5,15,27,53,59,119,102,135,172,311,240,473,318,371,427,833,528,1103,

%T 641,715,793,1643,928,1015,1105,1201,1301,2647,1472,3137,1653,1770,

%U 1890,2014,2142,4501,2361,2498,2640,5633,2879,6363,3126,3281,3442,7701,3715

%N a(1) = 1, a(n) = sum of n successive primes beginning with n if n is prime otherwise a(n) = sum of n successive composite numbers beginning with n.

%K nonn

%O 1,2

%A _Amarnath Murthy_, Jul 20 2005

%E More terms from _Franklin T. Adams-Watters_, Apr 26 2006

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Last modified August 19 05:55 EDT 2024. Contains 375284 sequences. (Running on oeis4.)