61879

Properties

Appears in sequences

• n is equal to the number of 1's in all numbers <= n written in base 7.at n=3A014887
• Numerators of the limit of coefficients of q in { [x^n] W(x,q) } when read backward from [q^(n*(n-1)/2)] to [q^(n*(n-1)/2 - (n-1))], where W satisfies: W(x,q) = exp( q*x*W(q*x,q) ).at n=26A126341
• Half the number of n X n binary matrices differing in at most one position between adjacent rows and at most one position between adjacent columns.at n=9A140336
• Least prime p such that the continued fraction expansion of its square root contains the first n natural numbers, but does not contain n+1.at n=20A185808
• Prime numbersat n=6222