23373

Appears in sequences

• Smallest natural number requiring n letters in English.at n=43A001166
• Number of letters in English name for n increases at these numbers.at n=35A001619
• Number of permutations of [n] with four inversions.at n=23A005287
• Numbers having four 5's in base 8.at n=16A043444
• Smallest positive integer requiring at least n letters (not including hyphens) when spelled out in English.at n=42A045494
• Smallest positive integer requiring at least n letters (not including hyphens) to be spelled out in English.at n=45A045495
• Indices of records in length of English name of n including spaces and dashes (A052360): n such that k < n => A052360(k) < A052360(n).at n=36A052362
• Numbers n whose English name has a greater length (A005589) than any smaller number.at n=31A052363
• a(n), when spelled in English, is the smallest positive integer with exactly n letters.at n=40A080777
• a(n) is the smallest positive integer > a(n-1) with exactly n letters when spelled in English.at n=40A084390
• Number of ways you can split the set of the first n primes into two proper subsets of which the sum of one is twice the sum of the other.at n=23A113043
• Triangle read by rows: T(0,0)=1; T(n,k) is the coefficient of x^k in the polynomial (-1)^n*p(n,x), where p(n,x) is the characteristic polynomial of the n X n tridiagonal matrix with 3's on the main diagonal and -1's on the super- and subdiagonal (n >= 1; 0 <= k <= n).at n=49A123965
• Duplicate of A123965.at n=49A124025
• Sum of the squares of the quadratic nonresidues of prime(n).at n=15A125617
• A convolution triangle of numbers based on A001906 (even-indexed Fibonacci numbers).at n=49A125662
• Least natural number in English which requires exactly n characters to spell including spaces and hyphens, or 0 if no such number exists. The inverse of A052360.at n=46A132363
• Least nonnegative integer which requires n letters to spell in English, excluding spaces and hyphens. A right inverse of A005589.at n=40A134629
• Number of reduced words of length n in the Weyl group A_26.at n=4A161526
• G.f. is the polynomial (1-x^3) * (1-x^6) * (1-x^9) * (1-x^12) * (1-x^15) * (1-x^18) / (1-x)^6.at n=26A162539
• G.f. is the polynomial (1-x^3) * (1-x^6) * (1-x^9) * (1-x^12) * (1-x^15) * (1-x^18) / (1-x)^6.at n=31A162539