312213

Appears in sequences

• Summarize the previous term (digits in increasing order), starting with a(1) = 1.at n=6A005151
• Look and Say sequence: describe the previous term! (method C - initial term is 2).at n=5A023989
• Palindromes which are the concatenation of 3 or more terms of an arithmetic sequence with nonzero difference.at n=19A062564
• a(n) is the number from which if even-positioned digits are deleted then one gets the concatenation of 1 to n, while if odd-positioned digits are deleted then one gets reverse concatenation of 1 to n. Position of least significant digit is considered to be 1.at n=2A078271
• Summarize the previous term in base 4 (in increasing order).at n=6A098155
• "Say what you see".at n=6A118628