129024

Appears in sequences

• Generalized tangent numbers.at n=5A002302
• Theta series of E_8 lattice with respect to deep hole.at n=19A004017
• Triangle of coefficients in expansion of D^n (tan x) in powers of tan x.at n=26A008293
• Denominator of [x^(2n+1)] in the Taylor expansion sin(cosec(x)-cot(x))= x/2 + x^3/48 - x^5/1280 - 55*x^7/129024 - 143*x^9/1769472 + ...at n=3A013517
• Triangle of coefficients in expansion of (1+4x)^n.at n=50A013611
• a(n) = self-convolution of row n of array T given by A027157.at n=6A027169
• Triangle whose (i,j)-th entry is binomial(i,j)*4^(i-j).at n=49A038231
• 5-fold convolution of A000302 (powers of 4); expansion of 1/(1-4*x)^5.at n=5A040075
• a(n)=(1/2)*T(2n,n), where T is given by A048113.at n=10A048117
• a(n)=T(2n+1,n+1), where T is given by A048113.at n=11A048118
• Triangle of idempotent numbers binomial(n,k)*k^(n-k), version 1.at n=49A059297
• Triangle of idempotent numbers binomial(n,k)*k^(n-k), version 2.at n=39A059298
• Triangle of idempotent numbers (version 3), T(n, k) = binomial(n, k) * (n - k)^k.at n=50A059299
• Triangle of idempotent numbers binomial(n,k)*k^(n-k), version 4.at n=41A059300
• Product of all distinct nonzero numbers that can be formed from the digits of n.at n=47A061497
• 14-almost primes (generalization of semiprimes).at n=14A069275
• Main diagonal of the table of k-almost primes (A078840): a(n) = (n+1)-st integer that is an n-almost prime.at n=14A078841
• Product of terms in row n of A082817.at n=4A082820
• Counts where both the odd composites (starting from 1) 1 mod 4 and 3 mod 4 are equal.at n=20A093182
• a(n) = (0^n + 4^n * binomial(2*n,n))/2.at n=5A098402