Sequences

Positions of ones in binary expansion of Euler's constant gamma.

Positions of 1's in binary expansion of Pi/4.

Positions of ones in binary expansion of e-2.

Positions of ones in binary expansion of 1/sqrt(2).

Positions of ones in binary expansion of the reciprocal of the golden ratio (0.618...).

Positions of ones in binary expansion of arctan(1/2)/Pi.

Positions of ones in the binary expansion of log(3)/log(2)-1.

Positions of 1's in the binary expansion of log(4)/log(3)-1.

The Danish composer Per Nørgård's "infinity sequence", invented in an attempt to unify in a perfect way repetition and variation: a(2n) = -a(n), a(2n+1) = a(n) + 1, a(0) = 0.

Delete all 0's from n.

Delete all digits '1' from the sequence of nonnegative integers.

Delete all 2's from the sequence of nonnegative integers.

Delete all digits 3 from the terms of the sequence of nonnegative integers.

Delete all 4's from the sequence of nonnegative integers.

Delete all 5's from the sequence of nonnegative integers.

Delete all 6's from the sequence of nonnegative integers.

Delete all 7's from the sequence of nonnegative integers.

Delete all 8's from the sequence of nonnegative integers.

Delete all 9's from the sequence of nonnegative integers.

Divisors of 2^32 - 1 (for a(1) to a(31), the 31 regular polygons with an odd number of sides constructible with ruler and compass).

Numerator of n!!/(n+1)!! (cf. A006882).

a(0) = 1; thereafter a(n) = denominator of (n-2)!! / (n-1)!!.

Numerator of n!!/(n+3)!!.

Denominator of n!!/(n+3)!!.

Numerator of average distance traveled by n-dimensional fly.

Denominator of average distance traveled by n-dimensional fly.

Triangle read by rows: row n lists the first n positive integers in decreasing order.

Concatenation of sequences (1,2,...,n-1,n,n-1,...,1) for n >= 1.

Concatenation of sequences (1,2,...,n-1,n,n-1,...,2) for n >= 2.

Concatenation of sequences (1,2,2,...,n-1,n-1,n,n,n-1,n-1,...,2,2,1) for n >= 1.

Integers in alphabetical order in U.S. English.

Concatenation of sequences (1,3,..,2n-1,2n,2n-2,..,2) for n >= 1.

Numbers whose binary expansion does not contain 101.

Numbers whose binary expansion does not contain 110.

Numbers whose binary expansion does not contain 011.

Numbers whose binary expansion does not contain 001.

Numbers whose binary expansion does not contain 010.

Triangle read by rows: the Bell transform of the triple factorial numbers A008544 without column 0.

Binary expansion contains 101.

Numbers whose binary expansion contains the substring '110'.

Numbers whose binary expansion contains the substring '011'.

Binary expansion contains 001.

Binary expansion contains 010.

Numbers whose binary expansion contains 100.

Numbers whose binary expansion starts 10.

Binary expansion starts 11.

Binary expansion starts 100.

Binary expansion starts 101.

Binary expansion starts 110.

Binary expansion starts 111.