26162

Appears in sequences

• Cluster series for bond percolation problem on b.c.c. lattice.at n=5A003206
• s(1)t(n) + s(2)t(n-1) + ... + s(k)t(n-k+1), where k = [ n/2 ], s = (Fibonacci numbers), t = A001950 (upper Wythoff sequence).at n=26A025085
• Period of 1/n in sequence A033938.at n=13A033939
• Palindromic even lucky numbers.at n=35A045960
• Composite palindromes whose sum of prime factors is palindromic (counted with multiplicity).at n=38A046354
• Palindromic even numbers with an odd number of distinct prime factors.at n=34A075809
• Palindromes k such that 3k + 1 is also a palindrome.at n=28A083829
• a(0)=1; a(n) = sigma_2(n) + sigma_3(n).at n=28A092344
• E.g.f.: exp(x) / (2 - exp(3*x))^(1/3).at n=5A124214
• Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 1), (-1, 1, 0), (1, 0, -1), (1, 0, 0)}.at n=12A148022
• a(n) = n*F(n+1) - (n+1)*F(n), where F = A000045.at n=18A264147
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 190", based on the 5-celled von Neumann neighborhood.at n=40A270683
• Number of letters (0's and 1's) in the n-th iterate of the final-letter-removed mapping defined at A289035.at n=18A293077
• Number of square twice-partitions of n.at n=31A306318
• Colombian palindromes.at n=38A332970