101101

Appears in sequences

• Smallest natural number requiring n words in English (as spoken in England).at n=8A001167
• Numbers whose square is a palindrome.at n=32A002778
• Numbers whose cube is a palindrome.at n=13A002780
• Carmichael numbers: composite numbers k such that a^(k-1) == 1 (mod k) for every a coprime to k.at n=16A002997
• Least positive multiple of n written in base 3 using only 0 and 1.at n=34A004283
• Numbers with mirror symmetry about middle.at n=36A006072
• Strong pseudoprimes to base 17.at n=34A020243
• Numbers k such that k^2 is a palindrome with an odd number of digits.at n=31A028816
• Decimal expansion of a(n) is given by the first n terms of the periodic sequence with initial period 1,0,1.at n=5A033128
• Numbers k such that k is a substring of its base-2 representation.at n=27A038102
• Sums of 4 distinct powers of 10.at n=7A038446
• Smallest n-digit Carmichael numbers.at n=3A048123
• Pseudoprimes to both base 2 and base 3, i.e., intersection of A001567 and A005935.at n=23A052155
• Palindromes whose square is a palindrome; also palindromes whose sum of squares of digits is less than 10.at n=23A057135
• Palindromes only using 0 and 1 (i.e., base-2 palindromes).at n=12A057148
• In base 2: start with n; if palindrome, stop; otherwise add to itself with digits reversed; a(n) gives palindrome at which it stops, or -1 if no palindrome is ever reached.at n=30A062128
• In base 2: start with n; if palindrome, stop; otherwise add to itself with digits reversed; a(n) gives palindrome at which it stops, or -1 if no palindrome is ever reached.at n=40A062128
• In base 2: start with n; if palindrome, stop; otherwise add to itself with digits reversed; a(n) gives palindrome at which it stops, or -1 if no palindrome is ever reached.at n=36A062128
• In base 2: start with n; add to itself with digits reversed; if palindrome, stop; otherwise repeat; a(n) gives palindrome at which it stops, or -1 if no palindrome is ever reached.at n=30A062129
• In base 2: start with n; add to itself with digits reversed; if palindrome, stop; otherwise repeat; a(n) gives palindrome at which it stops, or -1 if no palindrome is ever reached.at n=15A062129