49142

Appears in sequences

• n is equal to the number of 1's in all numbers <= n written in base 8.at n=16A014885
• Number of rooted compound windmills with n nodes and leaves of 2 colors where any 2 submills extending from the same node are different.at n=11A032161
• Monotonically increasing sequence of least positive integers, a(1)=1, such that the self-convolution produces all squares.at n=28A087150
• G.f.: Product_{k>0} (1+x^k)/((1-x^k)*(1+x^(3k))*(1+x^(5k))).at n=31A100823
• Number of permutations of length n which avoid the patterns 1234, 2431, 4213.at n=13A116813
• Number of numbers k in interval [(p_n)^2+1, (p_n)^4] for which lpf(k-3)>lpf(k-1)>=p_n, where p_n=prime(n) and lpf = A020639.at n=12A243803
• Number of nX6 0..1 arrays with every element unequal to 0, 2, 3, 5 or 8 king-move adjacent elements, with upper left element zero.at n=10A305358
• a(n) is the smallest number k for which A000120(k) = A000120(k') = n, or -1 if no such k exists, where k' is the arithmetic derivative of k (A003415).at n=13A350553
• First component A of the pairs (A, B), listed in increasing order, such that the multiset of digits of A union the multiset of digits of B equals the multiset of digits of A^2 and the multiset of digits of B^2, for some B >= A. Note that terms may be repeated.at n=13A389379