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A121057
Triangle read by rows: T(n,m) = Prime[m]^n*(Prime[m] - 1)/2
1
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
OFFSET
1,2
COMMENTS
Row sums are 1, 12, 310, 8400, 885775, 31374252, 3487878712, 161343848880, 20713255606813, 6100254882852900, ...
First column is A008837. - Michel Marcus, Apr 11 2013
EXAMPLE
Triangle begins
1;
3, 9;
10, 50, 250;
21, 147, 1029, 7203;
MATHEMATICA
t[n_, m_] = Prime[m]^n*(Prime[m] - 1)/2; a = Table[Table[t[n, m], {n, 1, m}], {m, 1, 10}] Flatten[a]
PROG
(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
CROSSREFS
Sequence in context: A335030 A335029 A228450 * A025538 A070354 A174565
KEYWORD
nonn,tabl
AUTHOR
Roger L. Bagula, May 27 2007
STATUS
approved