The OEIS is supported by the many generous donors to the OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A145413 Number of spanning trees with degrees 1 and 3 in K_6 X P_n. 0
 90, 50400, 28528560, 15618720960, 8555317093440, 4687533591644160, 2568304253243013120, 1407173820392030238720, 770990635166535068405760, 422425827340189334775152640 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 REFERENCES F. Faase, On the number of specific spanning subgraphs of the graphs G X P_n, Ars Combin. 49 (1998), 129-154. LINKS Table of n, a(n) for n=1..10. F. Faase, On the number of specific spanning subgraphs of the graphs G X P_n, Preliminary version of paper that appeared in Ars Combin. 49 (1998), 129-154. F. Faase, Counting Hamiltonian cycles in product graphs. F. Faase, Results from the counting program FORMULA Recurrence: a(1) = 90, a(2) = 50400, a(3) = 28528560, a(4) = 15618720960, a(5) = 8555317093440, a(6) = 4687533591644160, a(7) = 2568304253243013120, a(8) = 1407173820392030238720, a(9) = 770990635166535068405760, a(10) = 422425827340189334775152640, a(11) = 231447142314556654419647815680, a(12) = 126809906538716706435229846241280, a(13) = 69479157253021351235506090834329600, and a(n) = 516a(n-1) + 14600a(n-2) + 1541184a(n-3) + 19457664a(n-4) + 56414208a(n-5) + 82785024a(n-6) + 219608064a(n-7) - 213166080a(n-8) + 173408256a(n-9) + 21233664a(n-10). CROSSREFS Sequence in context: A246634 A270508 A134648 * A367459 A279442 A172572 Adjacent sequences: A145410 A145411 A145412 * A145414 A145415 A145416 KEYWORD nonn AUTHOR N. J. A. Sloane, Feb 03 2009 STATUS approved

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

Last modified July 21 09:16 EDT 2024. Contains 374472 sequences. (Running on oeis4.)