Square array A(n, k) = A064987(A246278(n, k)), read by falling antidiagonals; A064987(n) = n*sigma(n), applied to the prime shift array.

A379499

Square array A(n, k) = A064987(A246278(n, k)), read by falling antidiagonals; A064987(n) = n*sigma(n), applied to the prime shift array.

Terms

    a(0) =6a(1) =28a(2) =12a(3) =72a(4) =117a(5) =30a(6) =120a(7) =360a(8) =775a(9) =56a(10) =180a(11) =1080a(12) =1680a(13) =2793a(14) =132a(15) =336a(16) =672a(17) =19500a(18) =7392a(19) =16093a(20) =182a(21) =336a(22) =3510a(23) =3960a(24) =137200a(25) =24024a(26) =30927a(27) =306a(28) =496a(29) =1584

External references