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A029656
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Numbers in the (2,1)-Pascal triangle A029653 that are different from 1.
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1
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2, 2, 3, 2, 5, 4, 2, 7, 9, 5, 2, 9, 16, 14, 6, 2, 11, 25, 30, 20, 7, 2, 13, 36, 55, 50, 27, 8, 2, 15, 49, 91, 105, 77, 35, 9, 2, 17, 64, 140, 196, 182, 112, 44, 10, 2, 19, 81, 204, 336, 378, 294, 156, 54, 11, 2, 21, 100, 285, 540, 714, 672, 450, 210, 65, 12, 2, 23, 121, 385
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OFFSET
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1,1
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REFERENCES
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D. M. Bressoud, Proofs and Confirmations, Camb. Univ. Press, 1999; triangle on page 6, numerators.
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LINKS
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Table of n, a(n) for n=1..70.
Eric Weisstein's World of Mathematics, Alternating Sign Matrix.
D. Zeilberger, Dave Robbins's Art of Guessing, Adv. in Appl. Math. 34 (2005), 939-954.
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EXAMPLE
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Triangle begins:
2,
2,3,
2,5,4,
2,7,9,5,
2,9,16,14,6,
2,11,25,30,20,7,
...
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CROSSREFS
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Cf. A048601, A029638.
Sequence in context: A111089 A051664 A220949 * A121306 A073311 A003974
Adjacent sequences: A029653 A029654 A029655 * A029657 A029658 A029659
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KEYWORD
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nonn,tabl
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AUTHOR
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Mohammad K. Azarian
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EXTENSIONS
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More terms from James A. Sellers
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STATUS
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approved
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