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A032019
Doubles (index 2+) under "AGJ" (ordered, elements, labeled) transform.
0
2, 4, 48, 1128, 34320, 1373520, 66662400, 3813742800, 251390391840, 18762435034560, 1564074260179200, 144043759065840480, 14524339063446051840, 1591480683038304938880, 188297909111509215258240, 23925266494618098054725280, 3249209307832618101782690880
OFFSET
1,1
CROSSREFS
Sequence in context: A308665 A097424 A228596 * A181179 A175814 A303382
KEYWORD
nonn,eigen
EXTENSIONS
More terms from Sean A. Irvine, May 07 2020
STATUS
approved