272714

Appears in sequences

• Clone sequence C(2,3): a(1) = 1; for n > 1, a(n) is obtained by repeating each digit of a(n-1), summing the digits in groups of 3, and concatenating the digits of the sums.at n=23A283195
• a(n) = Sum_{d|n} d*binomial(d+2,3).at n=34A321598
• a(n) = Sum_{k=1..n} k^3*sigma_2(k), where sigma_2 is A001157.at n=9A364269