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A321061 Number of ordered pairs (p,q) of permutations of [n] with equal up-down signatures and p(1)=q(1)=5. 1
88, 952, 17008, 438496, 15214848, 678914816, 37727416576, 2548520444480, 205352644205568, 19438574276705792, 2134484763328610304, 269000435778983860224, 38553984887490450800640, 6234291052542667315675136, 1129460021283312750345682944 (list; graph; refs; listen; history; text; internal format)
OFFSET
5,1
LINKS
CROSSREFS
Column k=5 of A262372.
Sequence in context: A157730 A055749 A227479 * A295591 A182676 A228744
KEYWORD
nonn
AUTHOR
Alois P. Heinz, Oct 26 2018
STATUS
approved

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Last modified March 1 12:27 EST 2024. Contains 370433 sequences. (Running on oeis4.)