A151519 Number of 1-sided polytans (polyaboloes) with n cells.
1, 4, 6, 22, 56, 198, 624, 2182, 7448, 26319, 92826, 332181, 1192845, 4315845, 15678200, 57227380, 209623109, 770516966, 2840466846, 10499678185, 38905008340, 144475534207
Offset: 1
Links
- Ed Pegg, Jr., Illustrations of polyforms
- Eric Weisstein's World of Mathematics, Polytan
Crossrefs
Cf. A006074.
Extensions
a(13)-a(14) from George Sicherman, Sep 27 2012
a(15) from George Sicherman, Aug 06 2013
a(15) corrected and a(16)-a(20) from John Mason, Jan 07 2022
a(21)-a(22) from Aaron N. Siegel, Jun 07 2022