Number of numbers k in interval [(p_n)^2+1, (p_n)^4] for which lpf(k-3)>lpf(k-1)>=p_n, where p_n=prime(n) and lpf = A020639.

A243803

Number of numbers k in interval [(p_n)^2+1, (p_n)^4] for which lpf(k-3)>lpf(k-1)>=p_n, where p_n=prime(n) and lpf = A020639.

Terms

    a(0) =40a(1) =85a(2) =393a(3) =625a(4) =1557a(5) =2106a(6) =4069a(7) =9558a(8) =11476a(9) =22060a(10) =31530a(11) =35998a(12) =49142a(13) =76678a(14) =113799a(15) =125010a(16) =176824a(17) =216378a(18) =234064a(19) =313511a(20) =372054a(21) =481764a(22) =668344a(23) =768307a(24) =811635a(25) =926452a(26) =975785a(27) =1105924a(28) =1751993a(29) =1949976

External references