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A004077 Number of extended Skolem sequences of order n. 1
2, 2, 6, 22, 48, 160, 636, 3556, 19488, 95872, 594320, 4459888, 32131648, 227072544, 1875064880, 17851780784, 165367171136, 1506506453568, 15540217445728, 179708231523680, 2034547787823488, 22716589497430656 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
REFERENCES
CRC Handbook of Combinatorial Designs, 1996, p. 460.
LINKS
CROSSREFS
Sequence in context: A103179 A320932 A225942 * A271217 A202743 A007985
KEYWORD
nonn,more
AUTHOR
EXTENSIONS
a(15)-a(18) from Jeppe Winther Larsen (jwl(AT)itu.dk), Oct 12 2009
a(19)-a(21) from Fausto A. C. Cariboni, Apr 19 2017
a(22) from Fausto A. C. Cariboni, May 07 2017
STATUS
approved

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Last modified June 22 15:06 EDT 2024. Contains 373587 sequences. (Running on oeis4.)