52143

Appears in sequences

• a(n) = (2*n-1)*(5*n^2-5*n+6)/6.at n=31A063489
• Numbers k such that sigma(sigma(sigma(k))) == 6*sigma(k).at n=38A067065
• Numbers with 5 distinct digits {1,2,3,4,5} such that all adjacent digits (as well as first and last digits) are coprime.at n=51A104972
• a(n) = 62*n^2 + 1.at n=29A158676
• Number of partitions of n such that the number of parts is not a part and the number of distinct parts is a part.at n=48A241378
• Fixed points of the function A260529(n) = concatenation of the positions of digits 9, 8,..., 0 in the decimal representation of n, using 1 for the rightmost digit etc., skipping digits which don't occur.at n=35A260275
• Number of 1-dimensional sandpiles with n grains piling up against the wall.at n=23A291896