Sequences

a(1) = 3; a(2) = 11; to get a(n), n >= 3, convert a(n-1) from base 3 to base 2.

Denominators of strong coupling expansion, SU(3) lattice gauge theory.

Coefficients of series arising in solution of Riccati equation y' = y^2 + x^2.

Digits of powers of 3.

Digits of powers of 4.

Digits of powers of 5.

Digits of powers of 6.

Digits of powers of 7.

Digits of powers of 8.

Digits of powers of 9.

Digits of powers of 11.

Digits of powers of 12.

Digits of powers of 13.

a(0) = 1, thereafter a(n) = 4n.

Sectors on dartboard.

Coordination sequence for planar net 4.8.8.

Crystal ball sequence for planar net 4.8.8.

Prime numbers at the beginning of the 20th century (today 1 is no longer regarded as a prime).

Coordination sequence for planar net 3.6.3.6. Spherical growth function for a certain reflection group in plane.

Crystal ball sequence for planar net 3.6.3.6.

Molien series for 6-dimensional complex reflection group 4.U_4 (3) of order 2^9 .3^7 .5.7.

Molien series for Weyl group E_8.

Molien series for Weyl group E_7.

Molien series for Weyl group E_6.

a(n) = 3*n.

Multiples of 4.

Multiples of 5: a(n) = 5 * n.

Nonnegative multiples of 6.

Multiples of 7.

Multiples of 8.

Multiples of 9: a(n) = 9*n.

Multiples of 10: a(n) = 10*n.

Multiples of 11.

Multiples of 12.

Multiples of 13.

Multiples of 14.

Multiples of 15.

Multiples of 16.

Multiples of 17.

Multiples of 18.

Multiples of 19.

Multiples of 20.

Multiples of 21.

Multiples of 22.

Multiples of 23.

Multiples of 24.

Multiples of 25.

Number of n X n upper triangular matrices A of nonnegative integers such that a_1i + a_2i + ... + a_{i-1,i} - a_ii - a_{i,i+1} - ... - a_in = -1.

a(n) = n + max_{0 <= i <n} ((n-i)*a(i)), a(0) = 1.

Molien series of 4-dimensional representation of cyclic group of order 4 over GF(2) (not Cohen-Macaulay).