22225

Appears in sequences

• Numbers whose set of base-9 digits is {3,4}.at n=35A032833
• Denominators of continued fraction convergents to sqrt(487).at n=10A041929
• Numbers having four 2's in base 10.at n=12A043500
• Numbers using only the digits 2 and 5, that are both curved and straight.at n=31A072961
• Lunar fourth powers: n*n*n*n, where * is lunar multiplication.at n=25A087051
• Sum of smallest parts (counted with multiplicity) of all partitions of n into odd parts.at n=46A092313
• Triangle read by rows: T(n,k) is the number of rooted trees with k nodes which are disjoint sets of labels with union {1..n}. If a node has an empty set of labels then it must have at least two children.at n=33A094262
• Least multiple of prime(n) containing only prime digits (2,3,5,7).at n=30A113590
• Expansion of 1/(x^k*(1-x-2*x^(k+1))) for k=7.at n=34A143450
• a(n) = A007318 * [1, 6, 14, 9, 0, 0, 0, ...].at n=24A143690
• Determinant of the n X n matrix with (i,j)-entry equal to 1 or 0 according as |i-j| is prime or not.at n=23A228638
• 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(5).at n=9A237342
• Numbers divisible by prime(d) for each digit d in their base-9 representation, none of which may be zero.at n=52A256879
• Numbers k such that sopfr(k) = tau(k)^2.at n=19A305026
• Array read by downward antidiagonals: T(k,n) is the least number that has k prime factors (counted with multiplicity) and is the concatenation of n primes, or -1 if there is no such number.at n=31A374376