Lexicographically earliest increasing sequence a, b, c, ... such that every partial product (1-x^a), (1-x^a)(1-x^b), (1-x^a)(1-x^b)(1-x^c), ... has coefficients -1, 0, 1 only.
A274768
Lexicographically earliest increasing sequence a, b, c, ... such that every partial product (1-x^a), (1-x^a)(1-x^b), (1-x^a)(1-x^b)(1-x^c), ... has coefficients -1, 0, 1 only.
Terms
- a(0) =1a(1) =2a(2) =3a(3) =5a(4) =7a(5) =8a(6) =9a(7) =17a(8) =26a(9) =43a(10) =46a(11) =60a(12) =175a(13) =221a(14) =396a(15) =617a(16) =1013a(17) =1630a(18) =2643a(19) =4273a(20) =6916a(21) =11189a(22) =18105a(23) =29294a(24) =47399a(25) =76693a(26) =124092a(27) =200785a(28) =324877a(29) =525662
External references
- oeis: A274768