21743271936
domain: N
Appears in sequences
- A hierarchical sequence (S(W'2{3}*c) - see A059126).at n=26A059162
- Coefficient of q^n in (1-q)^4/(1-4q); dimensions of the enveloping algebra of the derived free Lie algebra on 4 letters.at n=18A118265
- a(n) = n*(n-3)*2^(n-2).at n=27A178987
- a(n) is denominator of y(n), where y(n+1) = (25*n^2-1)/48 * y(n) + (1/2)*Sum_{k=1..n}y(k)*y(n+1-k), with y(0) = -1.at n=6A269419
- a(n) is the least number with exactly n noninfinitary square divisors.at n=29A358262
- Antidiagonal products of A319840.at n=9A370753