40703

Appears in sequences

• a(n) = Sum_{k=0..n-1} sigma(2k+1)*sigma_3(n-k).at n=11A081860
• a(1)=1. a(n) = a(n-1) + (product of the earlier terms {among terms a(1) through a(n-1)} which are coprime to n).at n=7A127077
• a(n) = (1+n)*(9 + 11*n + 4*n^2)/3.at n=30A172482
• Number of 0..n arrays of length 5 with each element differing from at least one neighbor by something other than 1, starting with 0.at n=13A221543
• Decimal representation of the diagonal from the origin to the corner of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 589", based on the 5-celled von Neumann neighborhood.at n=15A289575
• Starts of runs of 3 consecutive Niven numbers in base 2 (A049445).at n=19A330932