a(1) = 1; then add 1, multiply by 2, subtract 3, multiply by 4, add 5, multiply by 6, subtract 7, multiply by 8 and so on.
A085111
a(1) = 1; then add 1, multiply by 2, subtract 3, multiply by 4, add 5, multiply by 6, subtract 7, multiply by 8 and so on.
Terms
- a(0) =1a(1) =2a(2) =4a(3) =1a(4) =4a(5) =9a(6) =54a(7) =47a(8) =376a(9) =385a(10) =3850a(11) =3839a(12) =46068a(13) =46081a(14) =645134a(15) =645119a(16) =10321904a(17) =10321921a(18) =185794578a(19) =185794559a(20) =3715891180a(21) =3715891201a(22) =81749606422a(23) =81749606399
External references
- oeis: A085111