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 A178961 Partial sums of number of symmetric foldings of a strip of n stamps (A001010). 0

%I

%S 1,3,5,9,15,23,41,61,117,165,343,475,1049,1397,3267,4275,10419,13231,

%T 33545,41965,109499,133895,359367,434123,1189795,1412351,3952757,

%U 4646449,13211071,15318819,44260077,50916453,148927917,169476849

%N Partial sums of number of symmetric foldings of a strip of n stamps (A001010).

%C Number of symmetric foldings of a strip of <= n stamps. The subsequence of primes begins 3, 5, 23, 41, 61, 1049, 1412351.

%F a(n) = SUM[i=1..n] A001010(i).

%e a(13) = 1 + 2 + 2 + 4 + 6 + 8 + 18 + 20 + 56 + 48 + 178 + 132 + 574 = 1049 is prime.

%Y Cf. A001010.

%K nonn

%O 1,2

%A _Jonathan Vos Post_, Dec 31 2010

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Last modified August 3 19:46 EDT 2021. Contains 346441 sequences. (Running on oeis4.)