A353978 Number of fixed polytans (polyaboloes) with n cells.
4, 9, 24, 71, 224, 740, 2496, 8565, 29792, 104701, 371304, 1326702, 4771380, 17256161, 62712800, 228883359, 838492436, 3081972336, 11361867384, 41998361480, 155620033360, 577900838281
Offset: 1
Extensions
a(21)-a(22) from Aaron N. Siegel, Jun 07 2022