1,3

Sign diagram of generating sequence: +---++++-+-+-+-+-+-+...

Index entries for reversions of series

(PARI) a(n)=if(n<1, 0, polcoeff(serreverse(x*(1-2*x^2*(1+x-x^3-x^4-x^5)+O(x^n))/(1+x)), n))

Sequence in context: A151097 A151098 A151099 this_sequence A049169 A049175 A049158

Adjacent sequences: A049181 A049182 A049183 this_sequence A049185 A049186 A049187

nonn

Olivier Gerard (olivier.gerard(AT)gmail.com)