100420

Appears in sequences

• Positive numbers k such that k and 4*k are anagrams in base 8 (written in base 8).at n=31A023075
• Binomial transform of [1, 3, 4, 3, 2, 0, 0, 0, ...].at n=33A136395
• Number of n X 1 0..4 arrays with values 0..4 introduced in row major order and each element equal to one or two horizontal and vertical neighbors.at n=17A198662
• Numbers <= 10^6 with valid Luhn mod 10 check digit, sorted first by check digit, then lexicographically.at n=5A249855