22200

Appears in sequences

• Even 9-gonal (or enneagonal) numbers.at n=40A028992
• In the list of divisors of n (in base 3), each digit 0-2 appears equally often.at n=18A045811
• Number of nonnegative solutions of x1^2 + x2^2 + ... + x10^2 = n.at n=22A045852
• n written efficiently in natural numbers base, i.e., in form ...wxyz where n =1*z + 2*y + 3*x + 4*w + ... with z < 1, y < 2, x < 3, w < 4, ...at n=22A055992
• Number of 5-block ordered tricoverings of an unlabeled n-set.at n=7A060489
• Engel expansion of sinh(1/2).at n=37A068379
• Numbers k such that sigma(k^2-k-1) = k*(k+1).at n=28A069826
• Smallest multiple of n using only digits 0 and 2.at n=23A078241
• Product of prime(n+1)-1 and prime(n)-1.at n=34A083553
• a(n) = (prime(n)-1)*(prime(n)+1).at n=34A084920
• Enneagonal numbers for which the product of the digits is also an enneagonal number.at n=26A117052
• Amicable triples: numbers such that sigma(x) = sigma(y) = sigma(z) = x+y+z, x<y<z. We order these triples according to the common value of sigma. Sequence gives y numbers.at n=2A125491
• Numbers k such that k and k^2 use only the digits 0, 2, 4, 8 and 9.at n=33A136909
• Size of acyclic domain of size n based on the replacement scheme.at n=11A144687
• Partial sums of A160414.at n=28A161325
• The fifth row of the ED1 array A167546.at n=6A167548
• Numbers consisting of either 2's and 0's or 5's and 0's.at n=36A168541
• Numbers k divisible respectively by the sum of digits, the sum of the squares and the sum of the cubes of digits in base 10 of k.at n=30A169664
• Numbers whose decimal expansion contains only 0's and 2's.at n=28A169965
• Squares in lunar arithmetic in base 3 written in base 3.at n=24A171396