39184

Appears in sequences

• Least k such that the first k terms of the Kolakoski sequence (A000002) contain n more 2's than 1's.at n=19A025503
• Expansion of (eta(q^4) * eta(q^12) / (eta(q) * eta(q^3)))^2 in powers of q.at n=20A123647
• Numbers d*p where d is a perfect number and p<d a prime not dividing d.at n=28A165772
• Number of permutations of {1,...,n} avoiding adjacent step pattern up, up, down, down, up, up.at n=8A177549
• Position of first appearance of each integer in A088568 (number of 1's minus number of 2's in first n terms of A000002).at n=31A288605
• a(n) = index where A088568 (or equally A294448) first reaches or exceeds n in magnitude.at n=19A294449
• a(n) = 2*a(n-1) + 6*a(n-2) for n >= 2, a(0) = 1, a(1) = 5.at n=8A307469