40824

Appears in sequences

• a(n) = 4^n - C(4,3)*3^n + C(4,2)*2^n - C(4,1).at n=7A000919
• Number of permutations of length n with spread 1.at n=7A004205
• Number of permutations of length n with spread 2.at n=6A004206
• Expansion of 1 / Sum_{n=-oo..oo} x^(n^2).at n=26A004402
• A traffic light problem: expansion of 2/(1 - 3*x)^3.at n=6A006043
• McKay-Thompson series of class 6c for Monster.at n=23A007262
• Triangle of coefficients in expansion of (1+9x)^n.at n=39A013616
• Number of overpartitions of n: an overpartition of n is an ordered sequence of nonincreasing integers that sum to n, where the first occurrence of each integer may be overlined.at n=26A015128
• Triangle of numbers T(n,k) = k!*Stirling2(n,k) read by rows (n >= 1, 1 <= k <= n).at n=31A019538
• Dirichlet convolution of powers of 3 (3,9,27,...) with themselves.at n=7A034719
• Number of partitions of n into parts not of the form 19k, 19k+9 or 19k-9. Also number of partitions with at most 8 parts of size 1 and differences between parts at distance 8 are greater than 1.at n=43A035978
• a(n) = n*(15*n^3 + 30*n^2 + 5*n - 2)*(n+4)!/5760.at n=4A037962
• Triangle read by rows: (i,j)-th entry is binomial(i,j)*3^(i-j)*8^j.at n=29A038226
• Triangle whose (i,j)-th entry is binomial(i,j)*8^(i-j)*3^j.at n=34A038281
• Triangle whose (i,j)-th entry is binomial(i,j)*9^(i-j)*1^j.at n=41A038291
• Triangular matrix arising in enumeration of catafusenes, read by rows.at n=60A038763
• Triangle read by rows, the Bell transform of n!*binomial(4,n) (without column 0).at n=23A049424
• Exponential reciprocal of A055924.at n=41A055925
• Palindromes using exactly four different symbols.at n=15A056455
• Palindromes using exactly four different symbols.at n=14A056455