1987654321

Appears in sequences

• Let N = 123456789123456789123456789..., with the digits from 1 to 9 repeated indefinitely. Then a(n) is the n-digit number formed from the digits starting at the {n(n-1)/2 +1}-th position of N, read backwards if n is even.at n=9A066580
• Concatenation of digits of natural numbers from n down to 1.at n=9A104759
• Concatenation of digits of natural numbers from n down to 1.at n=10A104759
• a(n) = concatenation of reversed digits of natural numbers from n down to 1.at n=9A138793