1234620

Appears in sequences

• a(n) = ((n-th prime)^5-(n-th prime)^3)/2.at n=7A138432
• Number of chiral pairs of rows of length 5 using up to n colors.at n=19A321672
• a(n) is the number of numbers of the form k + reverse(k) for at least one n-digit number k.at n=8A358985