21412

Appears in sequences

• Numbers that are the sum of 3 positive cubes in exactly 3 ways.at n=10A025397
• Numbers that are the sum of 3 positive cubes in 3 or more ways.at n=11A025398
• Numbers that are the sum of 3 distinct positive cubes in exactly 3 ways.at n=8A025401
• Numbers that are the sum of 3 distinct positive cubes in 3 or more ways.at n=9A025402
• Even palindromes in which parity of digits alternates.at n=27A030149
• Base-10 palindromes that start with 2.at n=36A043037
• Palindromes equal to the sum of a prime number with its index.at n=33A115888
• Shifts 3 places left under Dirichlet convolution.at n=42A144367
• Number of open knight's tour diagrams of a 3 X n chessboard that are symmetric under 180-degree rotation and have "type F": the endpoints occur in different columns and agree in color with the cells in the nearest corner.at n=16A169774
• Numbers n such that d(1)^1 + d(2)^2 + ... + d(p)^p and d(1)^p + d(2)^p-1 +... + d(p)^1 are squares, where d(i), i=1..p, are the digits of n.at n=43A178360
• Numbers that can be expressed as the sum of three nonnegative cubes in three ways.at n=14A219329
• Number of ways to write n as an ordered sum of 6 nonprime numbers.at n=36A341483
• Numbers that are the sum of seven fourth powers in six or more ways.at n=30A345572
• Numbers that are the sum of seven fourth powers in exactly six ways.at n=22A345828
• Alternating sum of the numbers in the trajectory of n for the 3x+1 problem.at n=30A386437