0,2

This sequence gives the total number of non-recursive "clauses" of n opening nodes, used in the construction of A089840.

(MIT Scheme) (define (A089835 n) (* (A000108 n) (A000108 n) (A000142 (1+ n))))

a(n) = A001246(n)*A000142(n+1) = A001813(n)*A000108(n). INVERTi transform of A089836.

Sequence in context: A014298 A090316 A128578 this_sequence A009251 A009447 A123741

Adjacent sequences: A089832 A089833 A089834 this_sequence A089836 A089837 A089838

nonn

Antti Karttunen (His_Firstname.His_Surname(AT)iki.fi), Dec 05 2003