A065229 - cp's OEIS frontend

A065229 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 pentagonal numbers. The first elements of the rows form a(n).

%I A065229 #7 Nov 01 2024 15:07:11
%S A065229 1,1,3,1,5,10,4,11,19,6,16,27,4,17,31,46,11,28,46,65,15,36,58,81,13,
%T A065229 38,64,91,2,31,61,92,124,12,46,81,117,154,16,55,95,136,178,11,55,100,
%U A065229 146,193,241,43,93,144,196,249,16,71,127,184,242,301,31,92,154,217,281,346
%N A065229 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 pentagonal numbers. The first elements of the rows form a(n).
%Y A065229 Mini-index to these sequences: A064766, A064865, A064866, A065221-A655234 are all of the same type. See A064766 for a detailed explanation.
%K A065229 easy,nonn
%O A065229 0,3
%A A065229 _Floor van Lamoen_, Oct 22 2001

cp's OEIS Frontend

A065229 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 pentagonal numbers. The first elements of the rows form a(n).