a(n) = floor(X/Y) where X = concatenation in decreasing order of (2n)-th even number to (n+1)-th even number and Y = that of first n even numbers in increasing order.
A067092
a(n) = floor(X/Y) where X = concatenation in decreasing order of (2n)-th even number to (n+1)-th even number and Y = that of first n even numbers in increasing order.
Terms
- a(0) =2a(1) =3a(2) =49a(3) =6540a(4) =8176a(5) =9814a(6) =11451a(7) =13088a(8) =14725a(9) =16362a(10) =17999a(11) =19636a(12) =21273a(13) =22910a(14) =24547a(15) =26184a(16) =27821a(17) =29458a(18) =31095a(19) =32732a(20) =34369a(21) =36006a(22) =37643a(23) =39280a(24) =40917a(25) =4217902a(26) =438013252a(27) =45423626657
External references
- oeis: A067092