1,1

a(n)=floor(3n+1+(5+n)/(1+n+n^2))=3n+1=A112414(n-2), n>2. [From R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Dec 13 2008]

a(3)=Floor{(6*3^0+5*3^1+4*3^2+3*3^3)/(1*3^0+1*3^1+1*3^2)}=Floor(138/13)=Floor(10.615)=10

Cf. A086790, A086814.

Sequence in context: A023385 A155776 A153032 this_sequence A048943 A130763 A120497

Adjacent sequences: A086819 A086820 A086821 this_sequence A086823 A086824 A086825

easy,nonn

Wang Dan (wangdan01(AT)lycos.com), Aug 07 2003