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A294024
Number of set partitions of [2n] such that the maximal absolute difference between consecutive elements within a block equals n.
1
1, 1, 5, 61, 1061, 25430, 791355, 30785899, 1455625827, 81849519019, 5379462393332, 407467385577745, 35154933887354837, 3420720341248634735, 372223103372998367607, 44962783637401793609530, 5990684079499573284887127, 875408497263831218021563807
OFFSET
0,3
FORMULA
a(n) = A287213(2n,n).
EXAMPLE
a(2) = 5: 124|3, 134|2, 13|24, 13|2|4, 1|24|3.
CROSSREFS
Cf. A287213.
Sequence in context: A162167 A134282 A146760 * A083082 A213110 A298695
KEYWORD
nonn
AUTHOR
Alois P. Heinz, Oct 21 2017
STATUS
approved