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Search: id:A128226
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| 1, 4, 2, 7, 7, 3, 10, 12, 10, 4, 13, 17, 17, 13, 5, 16, 22, 24, 22, 16, 6, 19, 27, 31, 31, 27, 19, 7, 22, 32, 38, 40, 38, 32, 22, 8, 25, 37, 45, 49, 49, 45, 37, 25, 9, 28, 42, 52, 58, 60, 58, 52, 42, 28, 10
(list; table; graph; listen)
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OFFSET
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1,2
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COMMENT
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Row sums = A084990: (1, 6, 17, 36, 65, 106,...). A128225 = A127899(unsigned) * A004736.
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FORMULA
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A004736 * A127899 (unsigned). By columns, (3k+1), (5k+2), (7k+3),...; k=0,1,2...
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EXAMPLE
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First few row of the triangle are:
1;
4, 2;
7, 7, 3;
10, 12, 10, 4;
13, 17, 17, 13, 5;
16, 22, 24, 22, 16, 6;
19, 27, 31, 31, 27, 19, 7;
...
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CROSSREFS
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Cf. A004736, A127899, A084990, A128225.
Sequence in context: A125271 A092314 A110841 this_sequence A049817 A120871 A019689
Adjacent sequences: A128223 A128224 A128225 this_sequence A128227 A128228 A128229
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KEYWORD
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nonn,tabl
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AUTHOR
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Gary W. Adamson (qntmpkt(AT)yahoo.com), Feb 19 2007
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