283974

Appears in sequences

• a(n) = a(1) + a(2) + ... + a(n-1) - a(m) for n >= 4, where m = 2*n - 3 - 2^(p+1) and p is the unique integer such that 2^p < n - 1 <= 2^(p+1), starting with a(1) = a(2) = 1 and a(3) = 3.at n=20A049892
• Sums of adjacent amicable numbers, a(n) = A063990(2n-1) + A063990(2n).at n=16A161005
• The sum of the numbers in the columns when the column sums are equal in the Factor balanced number procedure of A343153.at n=9A343154