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 A211969 Triangle of decimal equivalents of binary numbers with some initial repeats, A211968. 4
 3, 6, 7, 10, 12, 13, 14, 15, 20, 21, 24, 25, 26, 27, 28, 29, 30, 31, 36, 40, 41, 42, 43, 45, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 72, 73, 80, 81, 82, 83, 84, 85, 86, 87, 90, 91, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106 (list; graph; refs; listen; history; text; internal format)
 OFFSET 2,1 LINKS Alois P. Heinz, Rows n = 2..14, flattened EXAMPLE Irregular triangle begins, starting at row 2: 3; 6, 7; 10, 12, 13, 14, 15; 20, 21, 24, 25, 26, 27, 28, 29, 30, 31; 36, 40, 41, 42, 43, 45, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63; MAPLE s:= proc(n) s(n):= `if`(n=1, [[1]], map(x-> [[x[], 0], [x[], 1]][], s(n-1))) end: T:= proc(n) map (x-> add(x[i]*2^(nops(x)-i), i=1..nops(x)), select (proc(l) local i; for i to iquo(nops(l), 2) do if l[1..i]= l[i+1..2*i] then return true fi od; false end, s(n)))[] end: seq (T(n), n=2..7); # Alois P. Heinz, Dec 04 2012 CROSSREFS Complement of A211967. Row lengths give: A093370. Column 1 gives: A005418(n+1). Right border gives: A000225(n). Cf. A093370, A093371, A121880, A122536, A211027, A211029, A211973, A216955. Sequence in context: A188073 A286806 A297125 * A173059 A189387 A091087 Adjacent sequences: A211966 A211967 A211968 * A211970 A211971 A211972 KEYWORD nonn,tabf AUTHOR Omar E. Pol, Dec 03 2012 STATUS approved

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Last modified February 2 02:30 EST 2023. Contains 359997 sequences. (Running on oeis4.)