login
A087164
Records in A087162: A087162(a(n))=n.
1
1, 2, 3, 7, 23, 91, 383, 1639, 7043, 30295, 130343, 560827, 2413103, 10383031, 44675843, 192230119, 827123063, 3558924955, 15313255583
OFFSET
1,2
FORMULA
G.f.: (1-4x-x^2+2x^3-x^4)/(1-6x+8x^2-3x^3).
CROSSREFS
Cf. A087162.
Sequence in context: A133429 A087770 A237359 * A077213 A112601 A181609
KEYWORD
nonn
AUTHOR
Paul D. Hanna, Aug 22 2003
STATUS
approved