A065223 - cp's OEIS frontend

A065223 Fill a triangular array by rows by writing numbers 1 up to b(0), 1 up to b(1), etc., where b(n) are the heptagonal numbers (A000566). The final elements of the rows form a(n).

%I A065223 #8 Nov 01 2024 15:09:03
%S A065223 1,2,5,2,7,13,2,10,19,29,6,18,31,45,5,21,38,56,75,14,35,57,80,104,17,
%T A065223 43,70,98,127,9,40,72,105,139,174,21,58,96,135,175,216,23,66,110,155,
%U A065223 201,248,10,59,109,160,212,265,319,32,88,145,203,262,322,383,42,105
%N A065223 Fill a triangular array by rows by writing numbers 1 up to b(0), 1 up to b(1), etc., where b(n) are the heptagonal numbers (A000566). The final elements of the rows form a(n).
%Y A065223 Mini-index to these sequences: A064766, A064865, A064866, A065221-A655234 are all of the same type. See A064766 for a detailed explanation.
%K A065223 easy,nonn
%O A065223 0,2
%A A065223 _Floor van Lamoen_, Oct 22 2001

cp's OEIS Frontend

A065223 Fill a triangular array by rows by writing numbers 1 up to b(0), 1 up to b(1), etc., where b(n) are the heptagonal numbers (A000566). The final elements of the rows form a(n).