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A104747
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(n-3)*2^n+ n*(n+3)/2 +3.
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1
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1, 4, 12, 33, 87, 222, 550, 1327, 3129, 7236, 16464, 36957, 82027, 180346, 393354, 852123, 1835181, 3932352, 8388820, 17826025, 37748991, 79692054, 167772462, 352321863, 738197857, 1543504252, 3221225880, 6710886837
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,2
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COMMENTS
| Antidiagonal sums of A104746.
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LINKS
| Index to sequences with linear recurrences with constant coefficients, signature (7,-19,25,-16,4).
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FORMULA
| a(n) = +7*a(n-1) -19*a(n-2) +25*a(n-3) -16*a(n-4) +4*a(n-5). G.f. -x*(1-3*x+3*x^2) / ( (2*x-1)^2*(x-1)^3 ). - R. J. Mathar, Oct 30 2011
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EXAMPLE
| First few antidiagonals of A104746 are:
1;
1, 3; # Row sum 4
1, 4, 7; # Row sum 12
1, 5, 12, 15; # Row sum 33
1, 6, 17, 32, 31;
1, 7, 22, 49, 80, 63;
...
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CROSSREFS
| Cf. A104746.
Sequence in context: A001665 A066536 A168078 * A070050 A186025 A027941
Adjacent sequences: A104744 A104745 A104746 * A104748 A104749 A104750
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KEYWORD
| nonn
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AUTHOR
| Gary W. Adamson (qntmpkt(AT)yahoo.com), Mar 23 2005
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