a(n) is the number of nonnegative integers that can be represented in a 7-segment display by using only n segments (version A063720).
A343314
a(n) is the number of nonnegative integers that can be represented in a 7-segment display by using only n segments (version A063720).
Terms
- a(0) =0a(1) =0a(2) =1a(3) =1a(4) =2a(5) =7a(6) =5a(7) =16a(8) =19a(9) =39a(10) =77a(11) =103a(12) =226a(13) =334a(14) =636a(15) =1106a(16) =1827a(17) =3386a(18) =5568a(19) =10059a(20) =17281a(21) =29890a(22) =52771a(23) =90283a(24) =159191a(25) =274976a(26) =479035a(27) =835476a(28) =1447278a(29) =2528496
External references
- oeis: A343314