168021

Appears in sequences

• Sum of distinct powers of 20; i.e., numbers with digits in {0,1} base 20; i.e., write n in base 2 and read as if written in base 20.at n=27A063012
• Expansion of (6*x + 1) / ((x - 1)*(2*x - 1)*(4*x - 1)*(8*x - 1)).at n=5A177730
• Let the binary expansion of n be [b_d, b_{d-1}, ..., b_3, b_2, b_1, b_0]_2, where (if n>0) b_d = 1, b_i = 0 or 1 for i<d. To get a(n) concatenate the decimal numbers 2^(b_i) (if b_i = 1) or 0 (if b_i = 0).at n=27A302205
• Numbers that are the sum of eight fifth powers in three or more ways.at n=28A345611
• Numbers that are the sum of eight fifth powers in exactly three ways.at n=28A346328