a(n) is the number of nonnegative integers that can be represented in a 7-segment display by using only n segments (version A277116).
A343315
a(n) is the number of nonnegative integers that can be represented in a 7-segment display by using only n segments (version A277116).
Terms
- a(0) =0a(1) =0a(2) =1a(3) =1a(4) =2a(5) =6a(6) =6a(7) =14a(8) =19a(9) =36a(10) =67a(11) =103a(12) =194a(13) =315a(14) =560a(15) =971a(16) =1651a(17) =2895a(18) =4933a(19) =8581a(20) =14798a(21) =25515a(22) =44165a(23) =76067a(24) =131563a(25) =227034a(26) =392032a(27) =677152a(28) =1168742a(29) =2018769
External references
- oeis: A343315