61035156

Appears in sequences

• a(n) = (5^n - 1)/4.at n=12A003463
• Gaussian binomial coefficients [ n,11 ] for q = 5.at n=1A022218
• Sublattices of index n in generic 12-dimensional lattice.at n=4A038999
• Numbers of the form (5^{mr}-1)/(5^r-1) for positive integers m, r.at n=29A076284
• a(n) = Sum_{j=0..11} n^j.at n=5A105067
• Row sums in A112668.at n=11A110737
• a(n) = Sum_{d|n} Moebius(n/d)*d^(b-1)/phi(n) for b = 13.at n=4A160972
• Expansion of x*(1+5*x-5*x^3)/(1-6*x^2+5*x^4).at n=22A249222
• a(n) = (5^(2*(n + 1)) - 1)/4.at n=4A275766
• Numbers that are repdigits with length > 2 in more than two bases.at n=25A290869
• Oblong numbers that are repdigits with length > 2 in more than two bases.at n=0A309062
• Smallest oblong number that is a repdigit of length > 2 in exactly n bases.at n=3A309193
• Numbers m such that beta(m) = tau(m)/2 + 2 where beta(m) is the number of Brazilian representations of m and tau(m) is the number of divisors of m.at n=17A326382