a(n) is the index where n appears for first time in the list of first differences of the numbers with middle divisors.
A390114
a(n) is the index where n appears for first time in the list of first differences of the numbers with middle divisors.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =11a(4) =32a(5) =58a(6) =153a(7) =189a(8) =227a(9) =439a(10) =837a(11) =915a(12) =1949a(13) =2067a(14) =2485a(15) =2615a(16) =2938a(17) =7143a(18) =8016a(19) =7668a(20) =23497a(21) =30273a(22) =43179a(23) =42134a(24) =35240a(25) =32812a(26) =115743a(27) =47162a(28) =298915a(29) =48948
External references
- oeis: A390114