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A119725
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Triangular array read by rows: a(r,1)=a(r,r)=1; a(r,c)=3*a(r-1,c-1)+2*a(r-1,c).
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4
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1, 1, 1, 1, 5, 1, 1, 13, 17, 1, 1, 29, 73, 53, 1, 1, 61, 233, 325, 161, 1, 1, 125, 649, 1349, 1297, 485, 1, 1, 253, 1673, 4645, 6641, 4861, 1457, 1, 1, 509, 4105, 14309, 27217, 29645, 17497, 4373, 1, 1, 1021, 9737, 40933, 97361, 140941, 123929, 61237, 13121, 1
(list; table; graph; refs; listen; history; internal format)
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OFFSET
| 0,5
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COMMENTS
| Second column is like A036563. Second diagonal is A048473.
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REFERENCES
| TERMESZET VILAGA XI.TERMESZET-TUDOMANY DIAKPALYAZAT 133.EVF. 6.SZ. jun. 2002. Vegh Lea (and Vegh Erika): "Pascal-tipusu haromszogek" http://www.kfki.hu/chemonet/TermVil/tv2002/tv0206/tartalom.html
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EXAMPLE
| 1
1 1
1 5 1
1 13 17 1
1 29 73 53 1
1 61 233 325 161 1
1 125 649 1349 1297 485 1
1 253 1673 4645 6641 4861 1457 1
1 509 4105 14309 27217 29645 17497 4373 1
1 1021 9737 40933 97361 140941 123929 61237 13121 1
1 2045 22537 111077 317521 573965 670681 494261 209953 39365 1
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CROSSREFS
| Cf. A007318, A036563, A048473, A119726, A119727.
Sequence in context: A152654 A176487 A157177 * A111910 A181143 A144438
Adjacent sequences: A119722 A119723 A119724 * A119726 A119727 A119728
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KEYWORD
| easy,nonn,tabl
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AUTHOR
| Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Jun 14 2006
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EXTENSIONS
| Edited by Don Reble (djr(AT)nk.ca), Jul 24 2006
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