cp's OEIS Frontend

A092957 In the triangle 1 / 1*2 2*3 / 1*2*3 2*3*4 3*4*5 / ... if every number k is replaced by prime(k) one gets the following triangle 2 / 6 15 / 30 105 385 / 210 1155 5005 17017 / ... Sequence contains the row sums.

%I A092957 #7 Aug 18 2019 01:44:40
%S A092957 2,21,520,23387,1488080,126969115,14557233552,1815049963645,
%T A092957 289937962615754,52507954943028529,9917857274310865368,
%U A092957 2089330987019155955571,490521122195171102901196
%N A092957 In the triangle 1 / 1*2 2*3 / 1*2*3 2*3*4 3*4*5 / ... if every number k is replaced by prime(k) one gets the following triangle 2 / 6 15 / 30 105 385 / 210 1155 5005 17017 / ... Sequence contains the row sums.
%C A092957 The leading diagonal is given by A060381 and the first column by A002110.
%p A092957 a:=n->sum(product(ithprime(i+j-1),j=1..n),i=1..n): seq(a(n),n=1..16); # _Emeric Deutsch_, Jun 26 2005
%Y A092957 Cf. A092956.
%K A092957 easy,nonn
%O A092957 1,1
%A A092957 _Amarnath Murthy_, Mar 25 2004
%E A092957 More terms from _Emeric Deutsch_, Jun 26 2005