20314

Appears in sequences

• Number of symmetric foldings of a strip of n blank stamps.at n=18A001010
• Positive numbers k such that k and 2*k are anagrams in base 6 (written in base 6).at n=19A023064
• a(n) = s(1)t(n) + s(2)t(n-1) + ... + s(k)t(n+1-k), where k = [ (n+1)/2 ], s = (odd natural numbers), t = (primes).at n=31A024603
• a(n) = s(1)t(n) + s(2)t(n-1) + ... + s(k)t(n-k+1), where k = [ n/2 ], s = (odd natural numbers), t = (primes).at n=30A025117
• Number of divisor chains of length n which begin with n ("anchored" divisor chains).at n=27A094097
• Number of n X n symmetric binary matrices containing no more than six 1s in any 3 X 3 sub-block.at n=5A139016
• Numbers whose digits are a permutation of [0,...,n] and which contain the product of any two adjacent digits as a substring.at n=18A203569
• Vinogradov's constants arising in enumeration of solutions to Waring's problem in the evil numbers (A001969).at n=31A206375
• In base 5, numbers n which have 5 distinct digits, do not start with 0, and have property that the product (written in base 5) of any two adjacent digits is a substring of n.at n=2A210016
• Number of n X 3 arrays of the minimum value of corresponding elements and their horizontal or vertical neighbors in a random, but sorted with lexicographically nondecreasing rows and columns, 0..1 n X 3 array.at n=24A219286
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 462", based on the 5-celled von Neumann neighborhood.at n=39A272311
• 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=15A287916
• Number of edges in a Farey fan of order n.at n=46A360043