71680

Appears in sequences

• Denominators of coefficients for repeated integration.at n=10A002689
• Number of times n-th energy state appears in statistical sum of Ising model on 4 X 4 X 4 cube.at n=9A008551
• Expansion of e.g.f. sinh(tan(x)*exp(x)).at n=8A009608
• sec(tanh(x)+arctan(x))=1+4/2!*x^2+48/4!*x^4+1344/6!*x^6+71680/8!*x^8...at n=4A013150
• Hall normalization constants.at n=3A032369
• Triangle whose (i,j)-th entry is binomial(i,j)*2^(i-j)*4^j.at n=32A038210
• Triangle whose (i,j)-th entry is binomial(i,j)*4^(i-j)*2^j.at n=31A038232
• Denominators of coefficients in function a(x) such that a(a(x)) = sin x.at n=4A048603
• Duplicate of A048603.at n=4A048609
• Number of subsets of {1, 2, ..., n} that do not contain a subset of the form {x, 2x, 3x}.at n=17A068060
• 13-almost primes (generalization of semiprimes).at n=18A069274
• a(n) = 2^n*(n^2 - n + 8)/8.at n=12A081908
• Smallest number beginning with 7 and having exactly n prime divisors counted with multiplicity.at n=12A106427
• a(n) is the least integer of the form (n-2)(n-4)...(n-2k)/n. 0 if no such number exists.at n=17A109898
• Triangle T, read by rows, where matrix power T^-2 has -2^(n+1) in the secondary diagonal: [T^-2](n+1,n) = -2^(n+1), with all 1's in the main diagonal and zeros elsewhere.at n=23A117265
• Denominators of expansion of exp(1-sqrt(1-3*x)).at n=7A144526
• Totally multiplicative sequence with a(p) = 8*(p+2) for prime p.at n=29A167309
• Erroneous version of A002689.at n=10A169971
• Conjectured list of fully multisociable numbers.at n=37A183029
• Triangular array read by rows. T(n,k) is the number of functions f:{1,2,...,n}->{1,2,...,n} that have exactly k 3-cycles. n>=0, 0<=k<=floor(n/3).at n=17A185070