31451

Appears in sequences

• Numbers whose set of base-13 digits is {1,4}.at n=35A032825
• Array read by antidiagonals upwards: h(n,k) = number of sequences with n copies each of 1,2,...,k and longest increasing subsequence of length k (n>=1, k>=1).at n=17A047909
• Number of sequences with n copies each of 1, 2, 3 and longest increasing subsequence of length 3.at n=3A047911
• Number of n-celled diagonally symmetric polyominoes without holes.at n=21A056881
• Least number that ends an arithmetic progression of n numbers with the same prime signature.at n=16A087309
• Positions of records in A069862.at n=20A088947
• Least number that ends an arithmetic progression of n numbers with the same number of divisors.at n=16A090548
• Smallest semiprime (A001358) which is at the end of an arithmetic progression of n semiprimes.at n=16A096003
• Positive integers of the form (10*m^2+1)/11.at n=33A179338
• Numbers k for which there are no prime numbers in the range (k-4*sqrt(sqrt(k)), k].at n=15A192320
• Number of sequences with 4 copies each of 1,2,...,n and longest increasing subsequence of length n.at n=3A268847
• Numbers k such that 9*10^k + 89 is prime.at n=26A278335
• Number of squarefree parts in the partitions of n into 8 parts.at n=43A309461
• a(n) is the maximum integer for which some minimum-length sum equaling a(n) of perfect squares less than n^2 excludes (n-1)^2.at n=32A377084