The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A333037 Table read by rows: T(n,k) = number of k-sided polygons in an equal-armed cross with arms of length n (see Comments in A331456 for definition) for k = 3,4,5,6,7. 5
 4, 0, 0, 0, 0, 84, 20, 0, 0, 0, 380, 180, 0, 8, 0, 1076, 764, 40, 20, 0, 2380, 2316, 64, 48, 0, 4716, 5188, 224, 52, 0, 8236, 10492, 360, 92, 0, 13620, 18772, 632, 108, 0, 21188, 31380, 864, 196, 0, 31596, 49228, 1376, 224, 8, 44980, 74268, 1920, 272, 8 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,1 COMMENTS See the links in A331456 for images of the crosses. LINKS EXAMPLE Table begins: 4, 0, 0, 0, 0 84, 20, 0, 0, 0 380, 180, 0, 8, 0 1076, 764, 40, 20, 0 2380, 2316, 64, 48, 0 4716, 5188, 224, 52, 0 8236, 10492, 360, 92, 0 13620, 18772, 632, 108, 0 21188, 31380, 864, 196, 0 31596, 49228, 1376, 224, 8 44980, 74268, 1920, 272, 8 The row sums are A331456. CROSSREFS Cf. A331456 (regions), A333035 (vertices), A333036 (edges), A331451, A332723, A333025. Sequence in context: A290322 A274948 A005925 * A070206 A228368 A267701 Adjacent sequences:  A333034 A333035 A333036 * A333038 A333039 A333040 KEYWORD nonn,more,tabf AUTHOR Scott R. Shannon and N. J. A. Sloane, Mar 06 2020 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified June 4 11:05 EDT 2020. Contains 334825 sequences. (Running on oeis4.)