47081

Appears in sequences

• T(2n,n+2), T given by A026758.at n=7A026873
• Number of divisors of 240^n.at n=22A103532
• Numbers k such that the concatenation of k with 4*k gives a square.at n=6A115535
• Partial sum of centered tetrahedral numbers A005894.at n=22A132366
• Second differences of sequence A160644.at n=45A160648
• Number of nX3 1..3 arrays containing at least one of each value, all equal values connected, rows considered as a single number in nondecreasing order, and columns considered as a single number in nonincreasing order.at n=10A166831
• a(n) = AR(n) is the total number of aperiodic k-reverses of n.at n=22A180322
• Numbers k such that 3^(k-1) == 2^(k-1) !== 1 (mod k).at n=39A285300
• Numbers m > 1 such that every prime divisor p of m satisfies s_p(m) = p.at n=23A324458
• Number of double palindrome structures of length n using exactly two different symbols.at n=22A328688
• a(n) is the smallest number m such that tau(m - 1) = tau(m + 1) = tau(m) + n or 0 if no such m exists, where tau(k) = A000005(k).at n=26A350934
• The maximal norm of an additively indecomposable element in Shanks' simplest cubic field Q[x]/(x^3 - n*x^2 - (n+3)*x - 1).at n=32A387575
• Sum of squares of the multiplicities of pairwise distances among the vertices of a regular n-gon.at n=43A387858