OFFSET

1,3

LINKS

John Mason, Table of n, a(n) for n = 1..50 (This version corrects erroneous values from a(44) onwards in previous version)

T. R. Parkin, L. J. Lander, and D. R. Parkin, Polyomino Enumeration Results, presented at SIAM Fall Meeting, 1967, and accompanying letter from T. J. Lander (annotated scanned copy). See page 21. The 15th entry is not included because their value for A000105(15) was incorrect.

MATHEMATICA

CROSSREFS

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Jun 18 2015

EXTENSIONS

a(5)-a(6) corrected and a(15)-a(28) from Andrew Howroyd, Dec 04 2018

a(29) and beyond from John Mason, Dec 22 2021

STATUS

approved