1201200

Appears in sequences

• Multinomial coefficient n!/ ([n/4]!, [(n+1)/4]!, [(n+2)/4]!, [(n+3)/4]!).at n=13A022917
• Fifth column of triangle A062138 (generalized a=5 Laguerre).at n=4A062151
• a(n) = (n-p_1)(n-p_2)...(n-p_k) where p_k is the k-th prime and is also the largest prime < n.at n=17A080497
• Numbers that can be expressed as the difference of the squares of primes in exactly fourteen distinct ways.at n=12A092010
• Triangle T(n,k) by rows: coefficient [x^(n-k)] of 2^n * n! *L(n,1/2,x), with L the generalized Laguerre polynomials in the Abramowitz-Stegun normalization.at n=31A098503
• Max{ k!/(a(1)!*a(2)!*..*a(n)!) : a(1) + 2*a(2) + 3*a(3) + ... + n*a(n) = n, a(1) + a(2) + ... + a(n) = k }.at n=27A102462
• a(n) = n*(n^2-1)*(3*n+2).at n=26A115056
• Triangle of unsigned 3-Lah numbers.at n=40A143498
• Numbers with exactly 6 distinct prime divisors {2,3,5,7,11,13}.at n=31A147573
• Triangle read by rows: T(n,k) is the number of end rhyme patterns of a poem of an even number of lines (2n) with 1<=k<=n evenly rhymed sounds.at n=24A156289
• Triangle read by rows: T(n,k) is the number of permutations of {1,2,...,n} having k nonincreasing cycles (0<=k<=floor(n/3)). A cycle (b(1), b(2), ...) is said to be increasing if, when written with its smallest element in the first position, it satisfies b(1) < b(2) < b(3) < ... .at n=39A186756
• 7-quantum transitions in systems of N >= 7 spin 1/2 particles, in columns by combination indices.at n=22A213349
• Triangle S(n, k) by rows: coefficients of 2^((n-1)/2)*(x^(1/2)*d/dx)^n, where n = 1, 3, 5, ...at n=32A223523
• Triangle read by rows: T(n,k) = ((Stirling2)^2)(n,k) * k!at n=32A233357
• Number of squares that divide 1!*2!*3!*...*n!.at n=15A248784
• Denominator of Sum_{i = 1..n} (if(isprime(i), 0, 1/i)).at n=25A282503
• Denominator of the sum of the reciprocals of the first n nonprimes.at n=16A282512
• Denominator of the sum of the reciprocals of the first n composite numbers.at n=15A296358
• Triangle read by rows: T(n,k) = (3*n - 2*k)!/((n-k)!^3*k!).at n=32A318107
• Values of Euler's totient phi for A050498.at n=26A339883