25088

Appears in sequences

• Convolved Fibonacci numbers.at n=11A001872
• Expansion of a modular function for Gamma_0(6).at n=15A002508
• a(n) = Sum_{k=0..n} C(n-k,3k).at n=19A003522
• Numbers of form 2^i*7^j, with i, j >= 0.at n=48A003591
• Number of n-step self-avoiding walks on hexagonal lattice from (0,0) to (1,2).at n=7A005550
• a(n) = floor(n/5)*floor((n+1)/5)*floor((n+2)/5)*floor((n+3)/5)*floor((n+4)/5).at n=38A008382
• a(n) = a(n-3) + a(n-4), with a(0)=1, a(1)=a(2)=0, a(3)=1.at n=57A017817
• Numbers k such that the continued fraction for sqrt(k) has even period and if the last term of the periodic part is deleted the central term is 79.at n=38A031577
• Numbers whose prime factors are 2 and 7.at n=28A033847
• Numbers of form 7^i*8^j with i, j >= 0, sorted.at n=18A036566
• Differences between factorials and Xfactorials: A048631 - A000142.at n=8A048632
• Mean integral quotients associated with A048753.at n=15A048754
• Number of rooted Greg trees.at n=8A052300
• a(0)=1, a(1)=6, a(n)=49*8^(n-2) if n>=2.at n=5A055847
• McKay-Thompson series of class 40C for Monster.at n=53A058664
• Bisection of Fibonacci triangle A037027: odd-indexed members of column sequences of A037027 (not counting leading zeros).at n=39A060921
• Triangle of Gandhi polynomial coefficients.at n=18A065748
• 11-almost primes (generalization of semiprimes).at n=25A069272
• a(n) = gcd(d(n!^3), d(n!)), where d() is the number of divisors function.at n=26A069783
• Numbers k such that Omega(k) = Omega(k-1) + Omega(k-2) + Omega(k-3) + Omega(k-4) where Omega(k) denotes the number of prime factors of k, counting multiplicity.at n=23A078095