101220

Appears in sequences

• Positive numbers k such that k and 2*k are anagrams of each other in base 3 (k is written here in base 3).at n=10A023058
• A064637 converted to factorial base.at n=34A064477
• Sixth convolution of A000129(n+1) (generalized (2,1)-Fibonacci, called Pell numbers), n>=0, with itself.at n=6A073383
• Digitally balanced numbers: ternary numbers which have the same number of 0's as 1's as 2's.at n=9A181986
• Least k such that sum of n-th power of digits of k equals sum of prime divisors of k.at n=6A240387
• Numbers <= 10^6 with valid Luhn mod 10 check digit, sorted first by check digit, then lexicographically.at n=14A249855