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A147929 Number of permutations of floor(i*7/5), i=0..n-1, with all sums of two and three adjacent terms respectively unique. 0
1, 2, 6, 24, 74, 372, 1764, 9716, 58126, 350576, 2659814, 19804322, 164438708, 1469635802, 13218536446, 141134619260 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..16.

CROSSREFS

Sequence in context: A147920 A147947 A147938 * A147921 A263712 A263698

Adjacent sequences:  A147926 A147927 A147928 * A147930 A147931 A147932

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 17 2008

STATUS

approved

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Last modified August 19 23:59 EDT 2022. Contains 356231 sequences. (Running on oeis4.)