A065227 - cp's OEIS frontend

A065227 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 triangular numbers. The first elements of the rows form a(n).

%I A065227 #7 Nov 01 2024 15:07:47
%S A065227 1,1,3,3,1,6,2,9,2,11,21,11,23,8,22,1,17,34,7,26,46,12,34,57,15,40,66,
%T A065227 15,43,72,11,42,74,2,36,71,107,24,62,101,5,46,88,131,22,67,113,160,37,
%U A065227 86,136,187,49,102,156,1,57,114,172,231,60,121,183,246,57,122,188,255
%N A065227 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 triangular numbers. The first elements of the rows form a(n).
%Y A065227 Mini-index to these sequences: A064766, A064865, A064866, A065221-A655234 are all of the same type. See A064766 for a detailed explanation.
%K A065227 easy,nonn
%O A065227 0,3
%A A065227 _Floor van Lamoen_, Oct 22 2001

cp's OEIS Frontend

A065227 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 triangular numbers. The first elements of the rows form a(n).