cp's OEIS Frontend

A276942 Square array A(row,col): A(row,1) = A276937(row), and for col > 1, A(row,col) = A003961(A(row,col-1)), read by descending antidiagonals: A(1,1), A(1,2), A(2,1), A(1,3), A(2,2), A(3,1), etc.

%I A276942 #10 Sep 26 2016 20:41:22
%S A276942 2,3,6,5,15,9,7,35,25,10,11,77,49,21,14,13,143,121,55,33,18,17,221,
%T A276942 169,91,65,75,22,19,323,289,187,119,245,39,26,23,437,361,247,209,847,
%U A276942 85,51,30,29,667,529,391,299,1859,133,95,105,34,31,899,841,551,493,3757,253,161,385,57,38,37,1147,961,713,589,6137,377,319,1001,115,69,42
%N A276942 Square array A(row,col): A(row,1) = A276937(row), and for col > 1, A(row,col) = A003961(A(row,col-1)), read by descending antidiagonals: A(1,1), A(1,2), A(2,1), A(1,3), A(2,2), A(3,1), etc.
%C A276942 The starting offset is 2 because 1 is not included in the array proper. With it the terms are a permutation of A276078.
%C A276942 All terms on each row have the same prime signature.
%H A276942 Antti Karttunen, <a href="/A276942/b276942.txt">Table of n, a(n) for n = 2..631; the first 35 antidiagonals of array</a>
%F A276942 A(row,1) = A276937(row); for col > 1, A(row,col) = A003961(A(row,col-1)).
%e A276942 The top left corner of the array:
%e A276942    2,  3,  5,   7,  11,  13,  17,  19,  23,   29,   31,   37,   41,   43
%e A276942    6, 15, 35,  77, 143, 221, 323, 437, 667,  899, 1147, 1517, 1763, 2021
%e A276942    9, 25, 49, 121, 169, 289, 361, 529, 841,  961, 1369, 1681, 1849, 2209
%e A276942   10, 21, 55,  91, 187, 247, 391, 551, 713, 1073, 1271, 1591, 1927, 2279
%e A276942   14, 33, 65, 119, 209, 299, 493, 589, 851, 1189, 1333, 1739, 2173, 2537
%o A276942 (Scheme)
%o A276942 (define (A276942 n) (A276941bi (A004736 (- n 1)) (A002260 (- n 1)))) ;; Code for A276941bi given in A276941.
%Y A276942 Transpose: A276941.
%Y A276942 Leftmost column: A276937, second column: A276938.
%Y A276942 Rows from the top: A000040, A006094, A001248 (from 9 onward), A090076, A090090.
%Y A276942 Cf. A003961.
%Y A276942 Cf. A276078 (sorted into ascending order).
%Y A276942 Cf. also A276075, A276955.
%K A276942 nonn,tabl
%O A276942 2,1
%A A276942 _Antti Karttunen_, Sep 25 2016