Sequences

a(n)=least k such that the base 6 representation of n begins at s(k), where s=A030604.

Length of n-th run of digit 0 in A030604.

Length of n-th run of digit 1 in A030604.

Length of n-th run of digit 2 in A030604.

Length of n-th run of digit 3 in A030604.

Length of n-th run of digit 4 in A030604.

a(n)=(# 1's)-(# 0's) in first n terms of A030604.

(# 1's)-(# 2's) in first n terms of A030604.

a(n) = (# 2's)-(# 3's) in first n terms of A030604.

a(n)=(# 3's)-(# 4's) in first n terms of A030604.

(# 4's)-(# 5's) in first n terms of A030604.

Powers of 2 grouped in pairs of two digits (version 1).

Powers of 2 grouped in pairs of 2 digits (version 2).

Powers of 2 grouped in pairs of 2 digits (version 3).

n(n+Z(n)), where Z( ) is the Narayana-Zidek-Capell sequence (A002083).

Numbers with exactly 8 divisors.

Numbers with 9 divisors.

1 together with numbers of the form p*q^4 and p^9, where p and q are distinct primes.

Numbers with 11 divisors.

Numbers with 12 divisors.

Numbers with 13 divisors.

Numbers with 14 divisors.

Numbers with 15 divisors.

Numbers with 16 divisors.

Numbers with 17 divisors.

Numbers with 18 divisors.

Numbers with 19 divisors.

Numbers with 20 divisors.

Weight distribution of [128,43,32] extended binary primitive BCH (or XBCH) code.

Discriminant of lattice A_n of determinant n+1.

a(1) = 6; for n > 1, a(n) = product of next 2 primes after a(n-1).

Product of next 2 primes.

Map 1 to A, 2 to B, ... 26 to Z and 0 to space and the sequence reads: "NUMBER SERIES".

Decimal expansion of 10 - Pi.

Weight enumerator of [ 40,19,10 ] shortened QR code.

Weight enumerator of [ 42,21,10 ] XQR code.

Dimension of multiples of minimal representation of complex Lie algebra F4.

Dimensions of multiples of minimal representation of complex Lie algebra E6.

Dimensions of multiples of minimal representation of complex Lie algebra E7.

Dimensions of multiples of minimal representations of complex Lie algebra E_8.

Continued fraction for Gamma(1/3).

Continued fraction for Gamma(2/3).

n^3*a(n) is the number of circles in complex projective plane tangent to three smooth curves of degree n in general position.

n^4*a(n) is the number of spheres in complex projective space tangent to 4 smooth surfaces of degree n in general position.

Pair up the numbers.

Pair up the numbers.

Parity of digits of Pi.

1 iff n-th digit of Pi is >= (n+1)st digit.

Smallest possible maximum denominator in an expression for 1 as a sum of n distinct unit (Egyptian) fractions.

Erroneous version of A046068.