10000031

Appears in sequences

• Lexicographically earliest strictly increasing base 7 autovarious sequence: a(n) = number of distinct a(k) mod 7^n (written in base 7).at n=29A038116
• Lexicographically earliest strictly increasing base 8 autovarious sequence: a(n) = number of distinct a(k) mod 8^n (written in base 8).at n=32A038117
• a(1) = 1, a(2) = 21; for n>2, a(n) is the least number whose neighboring digit difference forms a(n-1) such that a(n+1) also exists.at n=7A110400
• Numbers k such that there are 15 digits in k^2 and for each factor f of 15 (1,3,5) the sum of digit groupings of size f is a square.at n=14A153751