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Search: id:A159924
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| A159924 |
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Triangle read by rows: a(m,m) = 1, for all m. For n < m, a(m,n) = a(m-1,n) + (sum of all terms in rows 1 through m-1). |
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+0
4
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| 1, 2, 1, 6, 5, 1, 22, 21, 17, 1, 99, 98, 94, 78, 1, 546, 545, 541, 525, 448, 1, 3599, 3598, 3594, 3578, 3501, 3054, 1, 27577, 27576, 27572, 27556, 27479, 27032, 23979, 1, 240327, 240326, 240322, 240306, 240229, 239782, 236729, 212751, 1, 2343850
(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 are A159925. Sum of all terms in rows 1 through m is A159926(m). A159926(m) - A159926(m-1) = A159925(m), for m >= 2.
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EXAMPLE
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The triangle starts like this:
1,
2,1,
6,5,1,
22,21,17,1
The sum of all these terms is 77. So adding 77 to each of the terms of the 4th row gets the fifth row: 22+77=99, 21+77=98, 17+77=94, 1+77=78, and the final terms is set at 1. So, row 5 is: 99,98,94,78,1.
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MAPLE
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A159924 := proc(n, m) option remember ; local s; if n = m then 1; else s := add(add(procname(r, c), c=1..r), r=1..n-1) ; procname(n-1, m)+s ; fi; end: for n from 1 to 13 do for m from 1 to n do printf("%d, ", A159924(n, m)) ; od: od: [From R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Apr 29 2009]
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CROSSREFS
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A159925, A159926, A1599247
Sequence in context: A055896 A159965 A116395 this_sequence A133367 A121576 A121575
Adjacent sequences: A159921 A159922 A159923 this_sequence A159925 A159926 A159927
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KEYWORD
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nonn,tabl
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AUTHOR
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Leroy Quet (q1qq2qqq3qqqq(AT)yahoo.com), Apr 26 2009
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EXTENSIONS
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More terms from R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Apr 29 2009
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