74613

Appears in sequences

• Figurate numbers or binomial coefficients C(n,6).at n=22A000579
• Binomial coefficient C(2n,n-5).at n=6A004311
• Expansion of e.g.f. 1/(3 - exp(x) - exp(2*x)).at n=5A004700
• Binomial coefficient C(22,n).at n=6A010938
• Binomial coefficient C(22,n).at n=16A010938
• a(n) = binomial(n,16).at n=6A010969
• Triangular array formed from odd elements to right of middle of rows of Pascal's triangle.at n=55A014475
• Odd integers m such that phi(m) | sigma(m).at n=25A015715
• Number of compositions of n into 7 ordered relatively prime parts.at n=16A023032
• Binomial coefficients: C(n,k), 6 <= k <= n-6, sorted.at n=36A024750
• Binomial coefficients: C(n,k), 6 <= k <= n-6, sorted.at n=37A024750
• Binomial coefficients: C(n,k), 5 <= k <= n-5, sorted, duplicates removed.at n=36A024757
• Binomial coefficients: C(n,k), 6 <= k <= n-6, sorted, duplicates removed.at n=20A024758
• Binomial coefficients C(2*n+6,6).at n=8A053135
• For a rational number p/q let f(p/q) = p*q divided by the sum of digits of p and q; a(n) is obtained by iterating f, starting at n/1, until an integer is reached, or if no integer is ever reached then a(n) = 0.at n=29A059175
• Numbers n such that the arithmetic, geometric and harmonic means of phi(n) and sigma(n) are all integers.at n=28A065146
• Numbers k such that sigma(k) = 4*phi(k).at n=22A068390
• Numbers k such that sigma(k) = phi(k*bigomega(k)).at n=25A068400
• Numbers n such that sum of distinct primes dividing n is divisible by the largest prime dividing n. Also n has exactly 5 distinct prime factors and n is squarefree.at n=20A071144
• a(n) = n*(n-1)*(2*n^2 + 1)/6.at n=22A071245