72765

Appears in sequences

• a(n) = (n+1)*(2*n)!/(2^n*n!) = (n+1)*(2n-1)!!.at n=6A001193
• Numerators of continued fraction convergents to sqrt(505).at n=5A041964
• Triangle T(m,s), m >= 0, 0 <= s <= m, arising in the computation of certain integrals.at n=29A059366
• Triangle T(m,s), m >= 0, 0 <= s <= m, arising in the computation of certain integrals.at n=34A059366
• Triangle T(n,k), 0<=k<=n, read by rows, defined by : T(0,0) = 1, T(n,k) = 0 if n<k or if k<0, T(n,k) = k*T(n-1, k-1) + (2n-2k-1)*T(n-1, k).at n=29A108032
• a(n) = 22 + floor( Sum_{j=1..n-1} a(j)/2 ).at n=20A120146
• A certain partition array in Abramowitz-Stegun order (A-St order).at n=30A134144
• Partition number array, called M32(-3), related to A000369(n,m) = |S2(-3;n,m)| (generalized Stirling triangle).at n=33A143173
• Partition number array, called M32(-3), related to A000369(n,m) = |S2(-3;n,m)| (generalized Stirling triangle).at n=34A143173
• Partition number array, called M32hat(-3)= 'M32(-3)/M3'= 'A143173/A036040', related to A000369(n,m)= |S2(-3;n,m)| (generalized Stirling triangle).at n=47A144279
• Numbers with exactly 4 distinct odd prime divisors {3,5,7,11}.at n=15A147577
• A partition product of Stirling_2 type [parameter k = -3] with biggest-part statistic (triangle read by rows).at n=26A157399
• a(n) = 19683*n - 5967.at n=3A157669
• T(n,k) = denominator of 2*Pi*Sum_{j=0..n-k-1} ((-1)^j*n*(k + j + 2)*(n + k +j)!*(k + j)!^2)/((n - k - j - 1)!*(2*k + j + 1)!*j!*Gamma(k + j + 3/2)*Gamma(k + j + 5/2)), triangle read by rows (n >= 1, 0 <= k <= n - 1).at n=14A159983
• A triangle related to the a(n) formulas of the rows of the ED4 array A167584.at n=27A167591
• A triangle related to the GF(z) formulas of the rows of the ED4 array A167584.at n=21A167594
• Triangle read by rows: T(n,k) is the number of cycle-up-down permutations of {1,2,...,n} having k cycles (1<=k<=n).at n=61A186366
• a(1) = 1. For n > 1, a(n) = a(n-1)/2 if a(n-1) is even, a(n) = a(n-1)*n otherwise.at n=22A290650
• A number triangle T(n,k) read by rows for 0<=k<=n, related to the Taylor expansion of f(u, p) = (1/2)*(1+1/(sqrt(1-u^2)))*exp(p*sqrt(1-u^2)).at n=30A305402
• Let k = A064771(n) be the n-th pseudoperfect number such that {d(i)} is a unique subset of its proper divisors that sums to k, a(n) is the least number m such that k*d(i)*m + 1 is prime for all d(i) in this subset so their product is a Carmichael number.at n=4A319011