Sequences

Inverse of 102nd cyclotomic polynomial.

a(n) = n*(n-1) + (n-2)*(n-3) + ... + 1*0 + 1 for n odd; otherwise, a(n) = n*(n-1) + (n-2)*(n-3) + ... + 2*1.

a(n) = a(n-1) + 2*a(n-2) with a(0)=0, a(1)=2.

Inverse of 105th cyclotomic polynomial.

Order of a certain Clifford group in dimension 2^n (the automorphism group of the Barnes-Wall lattice for n != 3).

Order of automorphism group of Barnes-Wall lattice in dimension 2^n.

Numbers k such that m^(k+1) == m (mod k) holds for all m.

Write in binary and read in ternary!.

Inverse of 110th cyclotomic polynomial.

Smallest number of persistence n over product-of-nonzero-digits function.

Numbers of form |2^i - 3^j|.

Numbers of form |2^i +- 3^j|.

Inverse of 114th cyclotomic polynomial.

Inverse of 115th cyclotomic polynomial.

Bisection of A001400.

Number of partitions of 2*n into at most 4 parts.

Mirimanoff primes: primes p such that p^2 divides 3^(p-1) - 1.

Inverse of 119th cyclotomic polynomial.

Inverse of 120th cyclotomic polynomial.

((n+3)!/6)*product( 2*k+1, k=0..n).

a(n) = 2*a(n-1) if n odd else 2*a(n-1) + 6.

Complement of triangular numbers (A000217); also array T(n,k) = ((n+k)^2 + n-k)/2, n, k > 0, read by antidiagonals.

Sum of a square and a triangular number.

Numbers that are not the sum of a square (A000290) and a triangular number (A000217).

Inverse of 126th cyclotomic polynomial.

Not of form x^3 + 2y^3 + 3z^3.

Partial sums of Catalan numbers (A000108).

Partial sums of (Catalan numbers starting 1, 2, 5, ...).

Inverse of 130th cyclotomic polynomial.

Apply partial sum operator twice to Catalan numbers.

Inverse of 132nd cyclotomic polynomial.

Inverse of 133rd cyclotomic polynomial.

Partial sums of A014138.

Apply partial sum operator twice to factorials.

Partial sums of A007489.

Partial sums of A003136.

Inverse of 138th cyclotomic polynomial.

a(n) = Sum_{m=1..n} Sum_{k=1..m} prime(k).

Inverse of 140th cyclotomic polynomial.

Apply partial sum operator thrice to primes.

Apply partial sum operator thrice to Catalan numbers.

Inverse of 143rd cyclotomic polynomial.

Expansion of 1/((1-x)^2*Product_{k>=1} (1-x^k)).

Inverse of 145th cyclotomic polynomial.

Sum of a nonnegative cube and a triangular number.

Numbers that are not the sum of a nonnegative cube and a triangular number.

Numbers that are the sum of 2 cubes and a triangular number.

Numbers that are not the sum of 2 cubes and a triangular number.

Inverse of 150th cyclotomic polynomial.

Apply partial sum operator thrice to partition numbers.