a(n) = 15*4^n + 70*2^n + 35*3^n + 5^(n+1) + 6^n + 126.
A254467
a(n) = 15*4^n + 70*2^n + 35*3^n + 5^(n+1) + 6^n + 126.
Terms
- a(0) =252a(1) =462a(2) =1122a(3) =3432a(4) =12342a(5) =49632a(6) =216342a(7) =1001952a(8) =4863462a(9) =24500352a(10) =127161462a(11) =676195872a(12) =3668030982a(13) =20227217472a(14) =113076824982a(15) =639383508192
External references
- oeis: A254467