A262806 a(n) = A065447(n) / A002275(floor((n+1)/2)).

1, 100, 9101, 91010000, 901900901001, 901900901001000000, 901089109010900090010001, 90108910901090009001000100000000, 9010080101801008010090100900009000100001, 90100801018010080100901009000090001000010000000000, 900999901099900099901099900999901000901000900000900001000001

Offset: 1

Author

Max Alekseyev, Oct 03 2015

Keywords

• nonn
• base
• easy

Examples

			a(5) = 100111000011111 / 111 = 901900901001.
		

Formula

a(n) = A065447(n) / A002275(floor((n+1)/2)).

a(2*n) = a(2*n-1) * 10^(2*n).