1,2

A probability argument suggests that this sequence may be finite.

a(1) = 2/2 =1; a(2) = 24/(2+4) = 4; a(3) = 246810/(2+4+6+8+10) = 8227; a(4) = 246810121416/(2+4+6+8+10+12+14+16).

Cf. A067121, A072723, A072725.

Sequence in context: A053951 A058460 A115050 this_sequence A116271 A058417 A151587

Adjacent sequences: A072721 A072722 A072723 this_sequence A072725 A072726 A072727

base,nonn

Henry Bottomley (se16(AT)btinternet.com), Jul 06 2002