0,3

a(n) = 3^A055591(n-1) = A055591(n)-A055591(n-1)

a(3) = 3^(0+1+3) = 3^4 = 81

Sequence in context: A013732 A060722 A134799 this_sequence A037111 A067202 A158995

Adjacent sequences: A055587 A055588 A055589 this_sequence A055591 A055592 A055593

easy,nonn

Henry Bottomley (se16(AT)btinternet.com), May 26 2000