78120

Appears in sequences

• In the pile of coconuts problem, the number of coconuts that remain to be shared equally at the end of the process.at n=4A002022
• Expansion of log(1+tanh(log(1+x))).at n=9A009383
• Number of 5-ary sequences with primitive period n.at n=7A054720
• Numbers k such that k | sigma_7(k) - phi(k)^7.at n=26A055701
• Number of primitive (aperiodic) palindromes using a maximum of five different symbols.at n=12A056461
• Number of primitive (period n) periodic palindromes using a maximum of five different symbols.at n=12A056496
• Nonnegative numbers that can be written as m^k - m (with m and k nonnegative) in more than one way.at n=7A057896
• Numbers that can be expressed as the difference of the squares of primes in exactly seven distinct ways.at n=22A092003
• Triangle of the numbers of unique-valued sequences of all lengths (from 1 to 2n-1) consisting of unit matrices (="matrix units") of order n.at n=30A114595
• Rectangular array read by antidiagonals: a(n, k) is the number of ways to put k labeled objects into n labeled boxes so that there are exactly two boxes with exactly one object (n, k >= 2).at n=50A131105
• a(n) = n^7 - n.at n=5A133499
• Product of the nonzero exponents in the prime factorization of n!.at n=33A135291
• Table T(n,k) by antidiagonals. T(n,k) is the number of length n primitive (=aperiodic or period n) k-ary words (n,k >= 1).at n=61A143324
• Number of reduced words of length n in Coxeter group on 4 generators S_i with relations (S_i)^2 = (S_i S_j)^7 = I.at n=10A164353
• a(n) = 5^n - 5.at n=7A178671
• Oblong numbers that are the product of two oblong numbers.at n=19A188660
• Numbers with prime factorization p*q*r*s^2*t^3 (where p, q, r, s, t are distinct primes).at n=20A190111
• Number of n X 3 0..1 arrays avoiding 0 0 0 and 0 0 1 horizontally and 0 0 1 and 1 0 0 vertically.at n=7A207712
• Exponent of general linear group GL(n,2).at n=5A211171
• a(n) = n! * (n^4 + n^2 + 1).at n=5A219619