100230

Appears in sequences

• Positive numbers k such that k and 3*k are anagrams in base 4 (written in base 4).at n=8A023060
• Positive numbers k such that k and 3*k are anagrams in base 7 (written in base 7).at n=33A023069
• Number of times the digit 4 appears in the first 10^n digits of Pi.at n=5A099295
• Number of base 30 circular n-digit numbers with adjacent digits differing by 4 or less.at n=5A125367
• Numbers <= 10^6 with valid Luhn mod 10 check digit, sorted lexicographically.at n=26A249854
• Numbers <= 10^6 with valid Luhn mod 10 check digit, sorted first by check digit, then lexicographically.at n=3A249855