Number of nonnegative integers with property that their base 7/2 expansion (see A024639) has n digits.

A245404

Number of nonnegative integers with property that their base 7/2 expansion (see A024639) has n digits.

Terms

    a(0) =7a(1) =21a(2) =70a(3) =245a(4) =861a(5) =3010a(6) =10535a(7) =36876a(8) =129066a(9) =451731a(10) =1581055a(11) =5533696a(12) =19367936a(13) =67787776a(14) =237257216a(15) =830400256a(16) =2906400896a(17) =10172403136a(18) =35603410976a(19) =124611938416a(20) =436141784456

External references