21971

Appears in sequences

• Number of nonequivalent dissections of an (n+2)-gon by nonintersecting diagonals up to rotation and reflection.at n=10A001004
• Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 23 ones.at n=15A031791
• Counterbalanced numbers: Composite numbers k such that phi(k)/(sigma(k)-k) is an integer.at n=25A055940
• a(n) = n^3 plus sum of digits of n^3.at n=27A123135
• a(n) = (a(n-1) + a(n-4))/gcd(a(n-1), a(n-4)) with a(1) = a(2) = a(3) = a(4) = 1.at n=55A214652
• Number of partitions of n where the difference between consecutive parts is at most 3.at n=44A238863
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 601", based on the 5-celled von Neumann neighborhood.at n=27A272824
• Number of weakly unimodal compositions of n in which the greatest part occurs exactly five times.at n=46A320316
• Numbers k such that k divides the sum of digits in factorial base of all numbers from 1 to k.at n=23A333702