1,1

a(n)^2 < A002330(n+2)^2 + A002331(n+2)^2 < a(n+1)^2.

Table of n, a(n) for n=1..73.

a(n) = A000196(A002144(n)).

Sequence in context: A332061 A317442 A132172 * A005376 A196362 A195879

Adjacent sequences: A080677 A080678 A080679 * A080681 A080682 A080683

nonn

Reinhard Zumkeller, Mar 02 2003

approved