29727

Appears in sequences

• Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 21 ones.at n=17A031789
• Gaps of 8 in sequence A038593 (lower terms).at n=18A038655
• Number of n X n binary arrays with all ones connected only in a 00100-00100-11111 pattern in any orientation.at n=8A146995
• Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 00100-00100-11111 pattern in any orientation.at n=19A146997
• Number of nonnegative integers with property that their base 9/7 expansion (see A024655) has n digits.at n=34A245429
• Number of length 6+2 0..n arrays with every three consecutive terms having the sum of some two elements equal to twice the third.at n=19A248439
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 297", based on the 5-celled von Neumann neighborhood.at n=36A271150
• a(1) = 1; a(n) = (2^n - 1)*((3^n - 1)/(2^n - 1) mod 1), n >= 2. Unreduced numerators of fractional parts of (3^n - 1)/(2^n - 1).at n=14A297446
• The sum of the first n terms of the sequence is the concatenation of the first n digits of the sequence, a(1) = 3.at n=4A299866
• a(n) = 3*2*1 + 6*5*4 + 9*8*7 + 12*11*10 + ... + (up to the n-th term).at n=24A319867
• a(n) is the number of 4 element sets of distinct integer sided strict rectangles that fill an n X n square.at n=39A384724