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A121057
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Triangle read by rows: T(n,m) = Prime[m]^n*(Prime[m] - 1)/2
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1
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1, 3, 9, 10, 50, 250, 21, 147, 1029, 7203, 55, 605, 6655, 73205, 805255, 78, 1014, 13182, 171366, 2227758, 28960854, 136, 2312, 39304, 668168, 11358856, 193100552, 3282709384, 171, 3249, 61731, 1172889, 22284891, 423412929, 8044845651
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OFFSET
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1,2
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COMMENTS
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Row sums are 1, 12, 310, 8400, 885775, 31374252, 3487878712, 161343848880, 20713255606813, 6100254882852900, ...
First column is A008837. - Michel Marcus, Apr 11 2013
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LINKS
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Table of n, a(n) for n=1..35.
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EXAMPLE
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Triangle begins
1;
3, 9;
10, 50, 250;
21, 147, 1029, 7203;
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MATHEMATICA
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t[n_, m_] = Prime[m]^n*(Prime[m] - 1)/2; a = Table[Table[t[n, m], {n, 1, m}], {m, 1, 10}] Flatten[a]
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PROG
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(PARI) trga(nrows) = {for (n=1, nrows, for (m=1, n, print1(prime(n)^m*(prime(n) - 1)/2, ", "); ); print(); ); } \\ Michel Marcus, Apr 11 2013
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CROSSREFS
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Sequence in context: A031115 A004669 A173242 * A025538 A070354 A174565
Adjacent sequences: A121054 A121055 A121056 * A121058 A121059 A121060
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KEYWORD
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nonn,tabl
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AUTHOR
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Roger L. Bagula, May 27 2007
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STATUS
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approved
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