23355

Appears in sequences

• s(1)t(n) + s(2)t(n-1) + ... + s(k)t(n+1-k), where k = [ (n+1)/2 ], s = A000201 (lower Wythoff sequence), t = A001950 (upper Wythoff sequence).at n=39A024686
• s(1)t(n) + s(2)t(n-1) + ... + s(k)t(n-k+1), where k = [ n/2 ], s = A000201 (lower Wythoff sequence), t = A001950 (upper Wythoff sequence).at n=38A025119
• Number of inequivalent ways to color faces of a cube using at most n colors.at n=9A047780
• Sums of terms of groups in A075621.at n=35A075625
• a(n) is the index of A110080 where n appears.at n=7A111187
• Least multiple of prime(n) containing only prime digits (2,3,5,7).at n=39A113590
• a(n) = Sum of all divisors of all numbers < (n+1)^2.at n=11A168013
• Half the number of (n+1) X 2 0..3 arrays with every 2 X 2 subblock diagonal sum differing from its antidiagonal sum by more than 3.at n=6A184223
• Half the number of (n+1)X8 0..3 arrays with every 2X2 subblock diagonal sum differing from its antidiagonal sum by more than 3.at n=0A184229
• T(n,k)=Half the number of (n+1)X(k+1) 0..3 arrays with every 2X2 subblock diagonal sum differing from its antidiagonal sum by more than 3.at n=21A184231
• T(n,k)=Half the number of (n+1)X(k+1) 0..3 arrays with every 2X2 subblock diagonal sum differing from its antidiagonal sum by more than 3.at n=27A184231
• Fibonacci-like sequence of numbers with nondecreasing positive digits. Let a^+ denote the number that is obtained from a if its positive digits are written in nondecreasing order, while zeros remain in their places. Let a<+>b = (a + b)^+. a(0)=0, a(1)=1, for n>=2, a(n) = a(n-1) <+> a(n-2).at n=72A237568
• Numbers x such that the sum of all their cyclic permutations is equal to that of all cyclic permutations of sigma(x) and all cyclic permutations of Euler totient function phi(x).at n=25A247317
• Number of (n+1) X (2+1) 0..1 arrays with no 2 X 2 subblock having the sum of its diagonal elements greater than the maximum of its antidiagonal elements.at n=14A251122
• Number of length 3 1..(n+1) arrays with every leading partial sum divisible by 2, 3 or 5.at n=37A254830
• Non-isomorphic colorings of the cube under rotations, using at most N colors on the faces and M colors on the vertices. Square array H(N,M) with N,M > 0 read by antidiagonals.at n=36A316093
• Factorial base Niven numbers (A118363) with a record gap to the next factorial base Niven number.at n=16A347495
• a(n) = 13*n^2 + 10*n + 3.at n=42A387659