cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A182828 Array of the numbers (3*i+1)*3^j, i>=0, j>=0, read by antidiagonals.

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%I A182828 #15 Mar 21 2022 15:34:47
%S A182828 1,3,4,9,12,7,27,36,21,10,81,108,63,30,13,243,324,189,90,39,16,729,
%T A182828 972,567,270,117,48,19,2187,2916,1701,810,351,144,57,22,6561,8748,
%U A182828 5103,2430,1053,432,171,66,25,19683,26244,15309,7290,3159
%N A182828 Array of the numbers (3*i+1)*3^j, i>=0, j>=0, read by antidiagonals.
%F A182828 T(i,j) = (3*i+1)*3^j, i>=0, j>=0.
%e A182828 Northwest corner:
%e A182828 1....3....9...27...
%e A182828 4...12...36..108...
%e A182828 7...21...63..189...
%e A182828 10..30...90..270...
%Y A182828 Cf. A000244 (row 1), A016777 (column 1).
%Y A182828 Cf. A054582, A182829, A182830.
%Y A182828 Terms in ascending order: A026225.
%K A182828 nonn,tabl
%O A182828 1,2
%A A182828 _Clark Kimberling_, Dec 06 2010