55553

Appears in sequences

• a(n) cannot be prefixed or followed by any digit to form a prime ('empty' prefixes allowed).at n=13A032736
• Composite numbers k such that all the decimal concatenations ik and ikj (i, j = 1...9) are also composite.at n=30A032737
• a(n) cannot be prefixed or followed by any digit to form a prime ('empty' prefixes and suffixes are allowed).at n=9A032738
• Numbers having four 5's in base 10.at n=23A043512
• Near-repdigit semiprimes with 5 as repeated digit.at n=30A105986
• Primes in carryless arithmetic mod 10 in which all digits except the rightmost are zero or five.at n=29A169984
• a(n) = (5*10^n - 23)/9.at n=4A173802
• A symmetrical triangle read by rows: T(n, k) = 2^n*(q^k - 1)*(q^(n - k) - 1) + 1, where q = 2.at n=39A176793
• A symmetrical triangle read by rows: T(n, k) = 2^n*(q^k - 1)*(q^(n - k) - 1) + 1, where q = 2.at n=41A176793
• Total number of largest parts in all partitions of n that contain at least two distinct parts.at n=41A182629
• For k in {2,3,...,9} define a sequence as follows: a(0)=0; for n>=0, a(n+1)=a(n)+1, unless a(n) ends in k, in which case a(n+1) is obtained by replacing the last digit of a(n) with the digit(s) of k^2. This is k(7).at n=39A237344
• Number A(n,k) of domicule tilings of a k X n grid; square array A(n,k), n>=0, k>=0, read by antidiagonals.at n=70A239264
• Number A(n,k) of domicule tilings of a k X n grid; square array A(n,k), n>=0, k>=0, read by antidiagonals.at n=73A239264
• Number of domicule tilings of a 4 X n grid.at n=7A239266
• Number of domicule tilings of a 7 X 2n grid.at n=2A239269
• Non-repdigit numbers n such that A045876(n) ends with n.at n=2A276802