1,1
a(n) = 2*(1 + A053171(n) + A053172(n) + A053173(n) + A053174(n)).
Sequence in context: A183637 A203961 A023082 * A159211 A083631 A083632
Adjacent sequences: A053167 A053168 A053169 * A053171 A053172 A053173
nonn
Ralf W. Grosse-Kunstleve (rwgk(AT)cci.lbl.gov), Mar 26 2000