2000002

Appears in sequences

• Numbers whose square contains the same digit more than 2/3 of the time and does not end in 0.at n=22A039820
• Numbers k such that k^2 contains only digits {0,4,8}, not ending with zero.at n=17A058441
• Palindromes whose digit sum is 4.at n=15A065983
• Useless numbers: numbers written in English without any of the letters e, s or u.at n=8A073418
• n, n^2 and n^3 all use only even digits.at n=18A085586
• Beginning with 1, palindromes such that successive differences are distinct primes.at n=24A088052
• Numbers n such that there are (presumably) ten palindromes in the Reverse and Add! trajectory of n.at n=9A090071
• Numbers k such that k and k^2 use only the digits 0, 2, 4 and 8.at n=37A136908
• Numbers whose English name requires fewer letters than twice the number of decimal digits.at n=8A235029
• In base 3, 0, together with numbers of the form i00j00k00m00... where i = 1 or 2 and j,k,m,... are 0, 1, or 2.at n=36A261660
• Base 3 numbers whose square is a palindrome in base 3.at n=27A263607
• Numbers k such that k and k^3 use only even digits.at n=24A353342
• Positions of records in A373779.at n=11A373780
• a(1) = 1; for n > 1, a(n) is the smallest unused positive number such that a(n), |a(n) - a(n-1)| and a(1) + ... +a(n) are all palindromes.at n=31A376856
• Distinct values occurring in first differences of A030655(n), listed in order of first appearance.at n=10A386014