71280

Appears in sequences

• Triangle whose (i,j)-th entry is binomial(i,j)*6^(i-j)*11^j.at n=16A038265
• Triangle whose (i,j)-th entry is binomial(i,j)*11^(i-j)*6^j.at n=19A038320
• E.g.f. (1-x)/(1-2x-x^2).at n=6A052608
• Factorial splitting: write n! = x*y*z with x<y<z and x maximal and z is minimal; sequence gives value of z.at n=14A061032
• Factorial splitting: write n! = x*y*z with x<y<z and x maximal and z is minimal; sequence gives value of z-x.at n=21A061033
• Numbers k such that sigma(k+1) = 5*phi(k).at n=9A067263
• a(1) = 1. For n > 1, a(n) = a(n-1) if n is prime, a(n) = a(n-1)/n if n is composite and divides a(n-1) else a(n) = n*a(n-1).at n=21A088304
• a(1) = 1. For n > 1, a(n) = a(n-1) if n is prime, a(n) = a(n-1)/n if n is composite and divides a(n-1) else a(n) = n*a(n-1).at n=22A088304
• Numbers k divisible by at least one nontrivial permutation (rearrangement) of the digits of k, excluding all permutations that result in digit loss.at n=16A090056
• Nonuple factorial, 9-factorial, n!9, n!!!!!!!!!.at n=33A114806
• Numbers n where either n or n+1 is divisible by the numbers from 1 to 12.at n=20A131662
• Eigentriangle, row sums = A125275.at n=41A147294
• a(n) = Product_{k = 1..n-1} (9*k - 3).at n=4A147630
• Integers with exactly 100 divisors.at n=1A163816
• Where A174102 sets a new record.at n=42A173570
• a(n) = n*(n-3)*(n^2-7*n+14)/8.at n=27A176145
• The Wiener index of the Dutch windmill graph D(6,n) (n>=1).at n=39A180578
• (n-1)-st elementary symmetric function of the first n terms of (2,3,1,2,3,1,2,3,1,...)=A010882.at n=14A203160
• (n-1)-st elementary symmetric function of the first n terms of (3,1,2,3,1,2,3,1,2,...).at n=14A203161
• (n-1)-st elementary symmetric function of the first n terms of (1,2,3,1,2,3,1,2,3,...).at n=14A203162