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⇱ The On-Line Encyclopedia of Integer Sequences (OEIS)

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Showing entries 1-10 | older changes
Triangle read by rows: T(n,k) is the number of permutations p of {1,2,...,n} such that the set {p(i)-i, i=1,2,...,n} has exactly k elements (1<=k<=n).
#37 by Sean A. Irvine at Fri Mar 13 20:17:45 EDT 2026
STATUS
#36 by Sean A. Irvine at Fri Mar 13 20:17:43 EDT 2026
MAPLE
STATUS
#35 by Alois P. Heinz at Fri Sep 16 21:50:09 EDT 2022
STATUS
#34 by Alois P. Heinz at Fri Sep 16 20:53:47 EDT 2022
EXAMPLE
STATUS
#33 by Jon E. Schoenfield at Fri Apr 05 02:35:38 EDT 2019
STATUS
#32 by Jon E. Schoenfield at Fri Apr 05 02:35:35 EDT 2019
MAPLE
STATUS
#31 by Alois P. Heinz at Mon Feb 18 07:30:44 EST 2019
STATUS
#30 by Alois P. Heinz at Sun Feb 17 07:35:06 EST 2019
CROSSREFS
#29 by Alois P. Heinz at Sat Feb 16 21:38:41 EST 2019
FORMULA
#28 by Alois P. Heinz at Sat Feb 16 20:47:12 EST 2019
FORMULA
CROSSREFS
STATUS