0,3

Partial sums of threshold functions of n variables. The subsequence of primes in this partial sum begins: 3, 11, 1363847.

Table of n, a(n) for n=0..7.

a(n) = SUM[i=0..n] A002833(i).

a(7) = 0 + 1 + 2 + 8 + 44 + 490 + 14074 + 1349228 = 1363847 is prime.

Cf. A002833.

Sequence in context: A207556 A180875 A136104 * A302147 A007841 A036760

Adjacent sequences: A174624 A174625 A174626 * A174628 A174629 A174630

more,nonn

Jonathan Vos Post, Mar 24 2010

approved