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A085845
Triangle T(n, k) read by rows; given by [0, 1, 0, 1, 0, 1, ...] DELTA [1, 1, 2, 5, 14, 42, 132, 429, 1430, ...] (A000108) where DELTA is Deléham's operator defined in A084938.
1
1, 0, 1, 0, 1, 2, 0, 1, 6, 6, 0, 1, 12, 40, 30, 0, 1, 20, 156, 474, 338, 0, 1, 30, 440, 4222, 15592, 11782, 0, 1, 42, 1010, 23030, 394082, 1779222, 1407202, 0, 1, 56, 2016, 88088, 5060140, 142358644, 709653964, 572269334, 0, 1, 72, 3640
OFFSET
0,6
LINKS
FORMULA
T(n,2) = A002378(n-1). - R. J. Mathar, Aug 08 2015
T(n,3) = (n-1)*(n-2)*(4*n^2-17*n+24)/3. - R. J. Mathar, Aug 08 2015
EXAMPLE
1;
0,1;
0,1,2;
0,1,6,6;
0,1,12,40,30;
...
CROSSREFS
Cf. A002378 (3rd column).
Sequence in context: A390724 A264550 A089949 * A138106 A131689 A278075
KEYWORD
nonn,tabl
AUTHOR
N. J. A. Sloane, Aug 16 2003
STATUS
approved