0,2

a(n) = (10^(n+1)-3^(n+1))/(10-3) = 10*a(n-1)+3^n = 3*a(n-1)+10^n. - Henry Bottomley (se16(AT)btinternet.com), Jul 25 2001

Sequence in context: A023329 A142896 A125425 this_sequence A064103 A051639 A138931

Adjacent sequences: A016142 A016143 A016144 this_sequence A016146 A016147 A016148

nonn

N. J. A. Sloane (njas(AT)research.att.com).