29178domain: NAppears in sequencesSum of first n 7-almost primes.at n=29A086059a(n) = 1458*n + 18.at n=19A157505Row sums of A291904.at n=54A291905a(0) = 0, a(1) = 1; for n > 1, a(n) = Sum_{k=0..n-2} a(k) XOR a(n-k-2).at n=18A318619