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A076110
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Triangle (read by rows) in which the n-th row contains first n terms of an A.P. with first term 1 and common difference (n-1).
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2
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1, 1, 2, 1, 3, 5, 1, 4, 7, 10, 1, 5, 9, 13, 17, 1, 6, 11, 16, 21, 26, 1, 7, 13, 19, 25, 31, 37, 1, 8, 15, 22, 29, 36, 43, 50, 1, 9, 17, 25, 33, 41, 49, 57, 65, 1, 10, 19, 28, 37, 46, 55, 64, 73, 82, 1, 11, 21, 31, 41, 51, 61, 71, 81, 91, 101, 1, 12, 23, 34, 45, 56, 67, 78, 89, 100
(list; table; graph; refs; listen; history; internal format)
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OFFSET
| 1,3
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COMMENTS
| Leading diagonal contains n^2 + 1 (A002522). Sum of the n-th row = (n+1)(n^2+2)/2 (A064808).
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FORMULA
| A076110(n)=L(n) with L=seq(seq(n*k+1, k = 0 .. n), n = 0 .. +oo) [From Yalcin (aktaryalcin(AT)gmail.com), Jul 14 2009]
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EXAMPLE
| 1; 1,2; 1,3,5; 1,4,7,10; 1,5,9,13,17; 1,6,11,16,21,26; 1,7,13,19,25,31,37; ...
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CROSSREFS
| Cf. A002522, A064808, A076111.
Sequence in context: A062105 A093412 A119355 * A117584 A199847 A047997
Adjacent sequences: A076107 A076108 A076109 * A076111 A076112 A076113
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KEYWORD
| easy,nonn,tabl
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AUTHOR
| Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Oct 09 2002
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EXTENSIONS
| More terms from Antonio G. Astudillo (afg_astudillo(AT)lycos.com), Apr 20 2003
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