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Partial sums of A006343.
0

%I #2 Mar 30 2012 18:40:52

%S 1,1,2,3,7,17,51,163,561,2004,7391,27873,107050,417152,1645339,

%T 6555752,26348334,106691779,434851380,1782551286,7344326285,

%U 30397197514,126324028956,526911437207,2205163133586,9256931835831,38967696710845

%N Partial sums of A006343.

%C Partial sums of Arkons: number of elementary maps with n-1 nodes. The subsequence of primes in the partial sum begins: 2, 3, 7, 17, 163, no more through a(26).

%F a(n) = SUM[i=0..n] A006343(i) = SUM[i=0..n].

%e a(7) = 1 + 0 + 1 + 1 + 4 + 10 + 34 + 112 = 163 is prime.

%Y Cf. A006343, A000934.

%K easy,nonn

%O 0,3

%A _Jonathan Vos Post_, Apr 07 2010