// output of ./demo/seq/A206702-demo.cc: // Description: //% OEIS sequence A206702: //% Number of subsets of S of { 0, 1, 2, ..., n-1 } such that //% for all u, v in S u + v is not in S. arg 1: 8 == n [Size of the set (n>=1)] default=8 1: .1...... { 1 } 2: .1.1.... { 1, 3 } 3: .1.1.1.. { 1, 3, 5 } 4: .1.1.1.1 { 1, 3, 5, 7 } 5: .1.1...1 { 1, 3, 7 } 6: .1..1... { 1, 4 } 7: .1..1..1 { 1, 4, 7 } 8: .1...1.. { 1, 5 } 9: .1...1.1 { 1, 5, 7 } 10: .1....1. { 1, 6 } 11: .1.....1 { 1, 7 } 12: ..1..... { 2 } 13: ..11.... { 2, 3 } 14: ..1...1. { 2, 6 } 15: ..1....1 { 2, 7 } 16: ...1.... { 3 } 17: ...11... { 3, 4 } 18: ...111.. { 3, 4, 5 } 19: ...1.1.. { 3, 5 } 20: ...1.1.1 { 3, 5, 7 } 21: ...1...1 { 3, 7 } 22: ....1... { 4 } 23: ....11.. { 4, 5 } 24: ....1..1 { 4, 7 } 25: .....1.. { 5 } 26: .....11. { 5, 6 } 27: .....1.1 { 5, 7 } 28: ......1. { 6 } 29: .......1 { 7 } ct=30