A sevens sequence: a(n) = (7^n - 1)/(2^(4 - 3*(n mod 2))).
A152418
A sevens sequence: a(n) = (7^n - 1)/(2^(4 - 3*(n mod 2))).
Terms
- a(0) =0a(1) =3a(2) =3a(3) =171a(4) =150a(5) =8403a(6) =7353a(7) =411771a(8) =360300a(9) =20176803a(10) =17654703a(11) =988663371a(12) =865080450a(13) =48444505203a(14) =42388942053
External references
- oeis: A152418