Exponents m such that the decimal expansion of 4^m exhibits its first zero from the right later than any previous exponent.

A239009

Exponents m such that the decimal expansion of 4^m exhibits its first zero from the right later than any previous exponent.

Terms

    a(0) =0a(1) =2a(2) =4a(3) =7a(4) =9a(5) =12a(6) =14a(7) =16a(8) =17a(9) =23a(10) =34a(11) =36a(12) =38a(13) =43a(14) =77a(15) =88a(16) =216a(17) =350a(18) =979a(19) =24186a(20) =28678a(21) =134759a(22) =205829a(23) =374627a(24) =2200364a(25) =16625243a(26) =29451854a(27) =162613199a(28) =8078176309a(29) =9252290259

External references