a(n) is the decimal equivalent of the binary number whose k-th least significant bit is 1 iff k is a prime number and k <= n.

A100634

a(n) is the decimal equivalent of the binary number whose k-th least significant bit is 1 iff k is a prime number and k <= n.

Terms

    a(0) =0a(1) =2a(2) =6a(3) =6a(4) =22a(5) =22a(6) =86a(7) =86a(8) =86a(9) =86a(10) =1110a(11) =1110a(12) =5206a(13) =5206a(14) =5206a(15) =5206a(16) =70742a(17) =70742a(18) =332886a(19) =332886a(20) =332886a(21) =332886a(22) =4527190a(23) =4527190a(24) =4527190a(25) =4527190a(26) =4527190a(27) =4527190a(28) =272962646a(29) =272962646

External references