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A119532 Number of n-ominoes plus number of n-iamonds. 0

%I #6 Jan 08 2023 13:03:16

%S 2,2,2,3,8,16,47,132,435,1445,5103,18259,66934,247826,928137,3500559,

%T 13290552,50712016,194358380,747624825,2885120934,11164896416,

%U 43313276948,168400053019,656028153120,2560227845391,10007858038797,39178672900385,153586295761270,602842558581537,2368994981198048

%N Number of n-ominoes plus number of n-iamonds.

%C Number of polyominoes with n cells plus number of polyiamonds with n cells. Turning over is allowed; holes are allowed.

%F a(n) = A000105(n) + A000577(n).

%Y Cf. A000105, A000577.

%K nonn

%O 0,1

%A _Jonathan Vos Post_, May 28 2006

%E More terms from _John Mason_, Jan 08 2023

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Last modified May 23 11:57 EDT 2024. Contains 372763 sequences. (Running on oeis4.)