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Search: id:A120852
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| A120852 |
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Triangle read by rows, where t(n,1) = 1, t(n,m) = t(n,m-1) + (largest noncomposite {1 or prime} in row {n-1}). |
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3
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| 1, 1, 2, 1, 3, 5, 1, 6, 11, 16, 1, 12, 23, 34, 45, 1, 24, 47, 70, 93, 116, 1, 48, 95, 142, 189, 236, 283, 1, 284, 567, 850, 1133, 1416, 1699, 1982, 1, 1700, 3399, 5098, 6797, 8496, 10195, 11894, 13593, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 1, 8, 15, 22, 29, 36, 43, 50, 57, 64, 71
(list; table; graph; listen)
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OFFSET
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1,3
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LINKS
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Leroy Quet, Home Page (listed in lieu of email address)
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EXAMPLE
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11 is the largest prime in row 4 of the triangle. So t(5,m) = 1 + 11*(m-1), for 1 <=m <= 5.
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PROGRAM
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(PARI) {z=11; w=[]; for(n=1, z, k=0; for(j=1, #w, if(k<w[j]&&(w[j]==1||isprime(w[j])), k=w[j])); print1(a=1, ", "); w=[a]; for(m=2, n, a=k+a; print1(a, ", "); w=concat(w, a)))} - (Klaus Brockhaus, Aug 17 2006)
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CROSSREFS
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Cf. A120853.
Row sums are in A160963. [From Klaus Brockhaus (klaus-brockhaus(AT)t-online.de), May 31 2009]
Sequence in context: A109533 A062705 A059234 this_sequence A058168 A058169 A002249
Adjacent sequences: A120849 A120850 A120851 this_sequence A120853 A120854 A120855
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KEYWORD
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nonn,tabl
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AUTHOR
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Leroy Quet Jul 08 2006
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EXTENSIONS
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More terms from Klaus Brockhaus (klaus-brockhaus(AT)t-online.de), Aug 17 2006
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