Irregular triangle T(n,k), n >= 0, 0 <= k < 2^(n-1), where T(n,k) = Product_{j=0..n-1} prime(n-j)^((j+1)*d_j), where d_j is the bit with digit weight 2^j in the binary expansion of 2^(n-1)+k.

A387465

Irregular triangle T(n,k), n >= 0, 0 <= k < 2^(n-1), where T(n,k) = Product_{j=0..n-1} prime(n-j)^((j+1)*d_j), where d_j is the bit with digit weight 2^j in the binary expansion of 2^(n-1)+k.

Terms

    a(0) =1a(1) =2a(2) =4a(3) =12a(4) =8a(5) =40a(6) =72a(7) =360a(8) =16a(9) =112a(10) =400a(11) =2800a(12) =432a(13) =3024a(14) =10800a(15) =75600a(16) =32a(17) =352a(18) =1568a(19) =17248a(20) =4000a(21) =44000a(22) =196000a(23) =2156000a(24) =2592a(25) =28512a(26) =127008a(27) =1397088a(28) =324000a(29) =3564000

External references