65416

Appears in sequences

• a(n) = 2^n - n*(n-1)/2.at n=16A014844
• Leading diagonal of triangle in A080521.at n=15A080522
• Octagonal numbers which are the sums of exactly two positive octagonal numbers.at n=29A136346
• a(1)=1; thereafter a(n) = 2^(number of bits in binary expansion of a(n-1)) + 1 + a(n-1).at n=13A232228
• Number of connected subgraphs of the 12 X 12 grid graph induced by a vertex subset of size n.at n=7A262245
• Number of length-4 0..n arrays with no repeated value greater than the previous repeated value.at n=14A269436
• Octagonal numbers (A000567) in which parity of digits alternates.at n=21A297647