OFFSET
0,3
COMMENTS
See A194847.
REFERENCES
D. E. Knuth, The Art of Computer Programming, vol. 4A, Combinatorial Algorithms, Section 7.2.1.3, Eq. (20), p. 360.
FORMULA
Equals A056557(n) + 1.
MAPLE
See A194847.
CROSSREFS
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Sep 03 2011
STATUS
approved