24612

Appears in sequences

• Number of periodic palindromes using exactly four different symbols.at n=13A056490
• Number of n-digit 4th powers.at n=18A102831
• The triangle T_2(n, m), where T_2(n, m) is the number of surjective multi-valued functions from {1, 1, 2, 3, ..., n-1} to {1, 2, 3, ..., m} by rows (n >= 1, 1 <= m <= n).at n=31A172106
• a(n) = prime(n)^2 - n.at n=36A182174
• Number of ordered triples (w,x,y) with all terms in {-n,...-1,1,...,n} and -2<=w+x+y<=2.at n=41A211616
• a(n) is the smallest nonnegative integer such that a(n)! contains a string of exactly n consecutive 0's, not including trailing 0's.at n=9A252652
• Number of (4+2) X (n+2) 0..3 arrays with every consecutive three elements in every row and diagonal having exactly two distinct values, and in every column and antidiagonal not having exactly two distinct values, and new values 0 upwards introduced in row major order.at n=29A252723
• Numbers m such that the decimal digits of m are exactly the same as those of all the indices corresponding to the prime factors of m.at n=17A287916
• The first Zagreb index of the Aztec diamond AZ(n) (see the Ramanes et al. reference, Theorem 2.1).at n=26A292344
• Triangle read by rows: T(n,k) is the number of achiral loops (necklaces or bracelets) of length n using exactly k different colors.at n=58A305540
• Expansion of -1/(1 - x)^2 + (1/(1 - x))*Product_{k>=1} (1 + x^k).at n=48A317910
• Number of periodic sequences of period 3n generated by the random period doubling substitution 0 --> {01, 10}, 1 --> {00}.at n=12A318134
• Square array A(n,k), n >= 0, k >= 0, read by antidiagonals downwards, where A(n,k) = n! * k! * [x^n * y^k] 1 / (1 - log(1-x) * log(1-y))^3.at n=40A382800
• a(n) = Sum_{k=0..n} (k!)^2 * binomial(k+2,2) * Stirling1(n,k)^2.at n=4A382806