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A026159
T(4n,n), where T is the array in A026148.
0
1, 3, 29, 286, 2955, 31350, 338513, 3701268, 40849164, 454106770, 5077352709, 57037374596, 643249683466, 7278351281985, 82587176568765, 939405430122520, 10708295003335044, 122293746883319148, 1398985504993006671, 16027662449198124300, 183869540691211039945
OFFSET
0,2
CROSSREFS
Sequence in context: A124263 A180828 A026130 * A025186 A140780 A268493
KEYWORD
nonn
EXTENSIONS
a(7) corrected and more terms from Sean A. Irvine, Sep 18 2019
STATUS
approved