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Row sums of triangle in A154724.
4

%I #8 Feb 03 2019 17:16:52

%S 1,2,3,12,15,18,21,40,45,50,55,84,65,70,105,80,119,162,57,140,189,154,

%T 161,264,225,182,297,196,203,390,155,352,429,170,385,468,333,418,585,

%U 360,369,714,387,396,855,414,423,720,343,650

%N Row sums of triangle in A154724.

%C Also, row sums of triangle in A154726.

%H Nathaniel Johnston, <a href="/A154785/b154785.txt">Table of n, a(n) for n = 1..10000</a>

%F a(n) = A154786(n) + n.

%p for n from 1 to 50 do rsum:=0: for k from 1 to 2*n-1 do if(k=n or (isprime(k) and isprime(2*n-k)))then rsum:=rsum+k:fi:od: printf("%d, ",rsum):od: # _Nathaniel Johnston_, Apr 19 2011

%Y Cf. A154724, A154725, A154726, A154727, A154783, A154784, A154786.

%K easy,nonn

%O 1,2

%A _Omar E. Pol_, Jan 15 2009

%E a(11)-a(50) from _Nathaniel Johnston_, Apr 19 2011