22960

Appears in sequences

• a(n) = 2*binomial(n,3).at n=42A007290
• [ 4th elementary symmetric function of {log(k)} ], k = 2,3,...,n.at n=11A025204
• Intrinsic 10-palindromes: n is an intrinsic k-palindrome if it is a k-digit palindrome in some base.at n=29A060947
• Numbers which can be expressed as the product of a number and its reversal in at least two different ways.at n=16A066531
• One-sixth of the area of some primitive Heronian triangles with a distance of 2n+1 between the median and altitude points on the longest side.at n=5A074076
• Length of list generated by n replacements of k by {-1-|k|, ..., 1+|k|} with increment 2, starting with {0}.at n=8A083691
• Numbers n such that 4*10^n + R_n + 2 is prime, where R_n = 11...1 is the repunit (A002275) of length n.at n=17A102981
• Numbers k such that 1*k + 1, 3*k + 1, 9*k + 1, 27*k + 1 are all primes.at n=23A112041
• 1/3 of product of three numbers: the n-th prime, the previous number and the following number.at n=12A127919
• Triangular array read by rows: for n, k >= 1, a(n+1, 1) = 2*a(n, n); a(n+1, k+1) = a(n, k)+a(n+1, k).at n=31A129340
• Partial sums of A162766.at n=15A164265
• Partial sums of A049486.at n=32A174655
• Number of n X 3 0..1 arrays avoiding 0 0 0 and 0 1 1 horizontally and 0 0 1 and 1 1 0 vertically.at n=23A207106
• Number of nX6 0..1 arrays avoiding 0 0 0 and 0 1 1 horizontally and 0 0 1 and 1 1 1 vertically.at n=6A207512
• Number of nX7 0..1 arrays avoiding 0 0 0 and 0 1 1 horizontally and 0 0 1 and 1 1 1 vertically.at n=5A207513
• Number of (w,x,y,z) with all terms in {1,...,n} and 2|w-x|=n+|y-z|.at n=41A212686
• Number of (w,x,y) with all terms in {0,...,n} and w != max(|w-x|,|x-y|,|y-w|).at n=28A213498
• Number of labeled graphs on 2n nodes with degree set {1,3}, with multiple edges and loops allowed.at n=3A228694
• Size of the smallest conjugacy class of size greater than 1 of the alternating group of degree n.at n=38A237036
• Number of (n+1)X(n+1) 0..3 arrays with the maximum plus the upper median of every 2X2 subblock equal.at n=1A237134