Sequences

Primes not containing the digit '3'.

Primes not containing the digit '4'.

Primes not containing the digit '5'.

Primes not containing the digit '6'.

Primes not containing the digit '7'.

Primes not containing the digit '8'.

Primes not containing the digit '9'.

Primes not containing the digit '0'.

Smallest positive number that needs more lines when shown on a 7-segment display (digital clock) than any previous term.

Growth function (or coordination sequence) of the infinite cubic graph corresponding to the srs net (a(n) = number of nodes at distance n from a fixed node).

Growth function of an infinite cubic graph (number of nodes at distance <=n from fixed node).

Triangular array that counts rooted polyominoes.

Smallest prime p such that p/pi(p)>=n.

Values of pi(x) where x exceeds n * pi(x).

a(n) is smallest number m such that m = n*pi(m), where pi(k) = number of primes <= k (A000720).

Smallest positive integer m such that m = pi(n*m) = A000720(n*m).

Number of solutions x to n * pi(x) = x, where pi(x) = number of primes <= x.

Erroneous version of A039686.

Convolution of Catalan numbers A000108 with Catalan numbers but C(0)=1 replaced by 3.

Number of partitions of n is not squarefree.

Continued fraction expansion of Sum_{k>=1} 1/(2^k - 1).

Numbers k such that k-th and (k+1)-st term of A038593 differ by 1.

Numbers k such that k-th and (k+1)-st term of A038593 differ by 2.

Numbers k such that k-th and (k+1)-st term of A038593 differ by 3.

Numbers k such that k-th and (k+1)-st term of A038593 differ by 4.

Numbers k such that k-th and (k+1)-st term of A038593 differ by 5.

Numbers k such that k-th and (k+1)-st term of A038593 differ by 6.

Numbers k such that k-th and (k+1)-st term of A038593 differ by 7.

Numbers k such that k-th and (k+1)-st term of A038593 differ by 8.

Numbers k such that k-th and (k+1)-st term of A038593 differ by 9.

Numbers k such that k-th and (k+1)-st term of A038593 differ by 10.

Least k such that k-th and (k+1)-st term of A038593 are the first consecutive pair that differ by n.

Gaps of 2 in sequence A038593 (lower terms).

Gaps of 2 in sequence A038593 (upper terms).

Gaps of 3 in sequence A038593 (lower terms).

Gaps of 3 in sequence A038593 (upper terms).

Gaps of 4 in sequence A038593 (lower terms).

Gaps of 4 in sequence A038593 (upper terms).

Gaps of 5 in sequence A038593 (lower terms).

Gaps of 5 in sequence A038593 (upper terms).

Gaps of 6 in sequence A038593 (lower terms).

Gaps of 6 in sequence A038593 (upper terms).

Gaps of 7 in sequence A038593 (lower terms).

Gaps of 7 in sequence A038593 (upper terms).

Gaps of 8 in sequence A038593 (lower terms).

Gaps of 8 in sequence A038593 (upper terms).

Gaps of 9 in sequence A038593 (lower terms).

Gaps of 9 in sequence A038593 (upper terms).

Gaps of 10 in sequence A038593 (lower terms).

Gaps of 10 in sequence A038593 (upper terms).