72729

Appears in sequences

• 3rd power of rooted tree enumerator; number of linear forests of 3 rooted trees.at n=11A000242
• Numbers k such that k*(k+2) is the concatenation of two numbers m and m+3.at n=6A116308
• Odd numbers n containing 65536 as the highest power of 2 in their Collatz (3x+1) iteration.at n=18A247716
• If n^2 has an even number of digits, write n after the left half of the digits of n^2 and before the right half, otherwise if n^2 has 2t+1 digits, write n after the first t digits of n^2 and before the last t+1 digits.at n=26A274620